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  • Ultra-low cost and highly stable hydrated FePO4 anodes for aqueous sodium-ion battery
    J. Power Sources (IF 6.395) Pub Date : 2017-11-17
    Yuesheng Wang, Zimin Feng, Dharminder Laul, Wen Zhu, Manon Provencher, Michel L. Trudeau, Abdelbast Guerfi, Karim Zaghib
    更新日期:2017-11-20
  • Gas explosions and thermal runaways during external heating abuse of commercial lithium-ion graphite-LiCoO2 cells at different levels of ageing
    J. Power Sources (IF 6.395) Pub Date : 2017-11-17
    Fredrik Larsson, Simon Bertilsson, Maurizio Furlani, Ingvar Albinsson, Bengt-Erik Mellander

    Commercial 6.8 Ah lithium-ion cells with different ageing/status have been abused by external heating in an oven. Prior to the abuse test, selected cells were aged either by C/2 cycling up to 300 cycles or stored at 60 °C. Gas emissions were measured by FTIR and three separate vents were identified, two well before the thermal runaway while the third occurred simultaneously with the thermal runaway releasing heavy smoke and gas. Emissions of toxic carbon monoxide (CO), hydrogen fluoride (HF) and phosphorous oxyfluoride (POF3) were detected in the third vent, regardless if there was a fire or not. All abused cells went into thermal runaway and emitted smoke and gas, the working cells also released flames as well as sparks. The dead cells were however less reactive but still underwent thermal runaway. For about half of the working cells, for all levels of cycle ageing, ignition of the accumulated battery released gases occurred about 15 s after the thermal runaway resulting in a gas explosion. The thermal runaway temperature, about 190 °C, varied somewhat for the different cell ageing/status where a weak local minimum was found for cells cycled between 100 and 200 times.

    更新日期:2017-11-20
  • Uncovering the role of Nb modification in improving the structure stability and electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode charged at higher voltage of 4.5 V
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    Siyang Liu, Xiang Chen, Jiayue Zhao, Junming Su, Congcong Zhang, Tao Huang, Jianhua Wu, Aishui Yu
    更新日期:2017-11-17
  • Bismuth oxyfluoride @ CMK-3 nanocomposite as cathode for lithium ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    Dan Ni, Wang Sun, Liqiang Xie, Qinghua Fan, Zhenhua Wang, Kening Sun

    Bismuth oxyfluoride impregnated CMK-3 nanocomposite is synthesized by a facile nanocasting approach. Mesoporous carbon CMK-3 can suppress the aggregation and growth of bismuth oxyfluoride particles and offer rapid electron and Li ion passageways. Bismuth oxyfluoride nanoparticles are embedded in the mesoporous channels with particle size less than 20 nm. The bismuth oxyfluoride@CMK-3 nanocomposite maintains 148 mA h g−1 after 40 cycles with the capacity from both the bismuth oxyfluoride and the functional groups on the mesoporous carbon. The hybrid with confined bismuth oxyfluoride nanoparticles, conductive carbon network, and oxygen functional groups on the carbon matrix exhibits higher capacity and cycling stability than bulk bismuth oxyfluoride particles when used as lithium ion batteries cathode.

    更新日期:2017-11-17
  • Facile formation of 2D Co2P@Co3O4 microsheets through in-situ toptactic conversion and surface corrosion: Bifunctional electrocatalysts towards overall water splitting
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    Lihua Yao, Nan Zhang, Yin Wang, Yuanman Ni, Dongpeng Yan, Changwen Hu
    更新日期:2017-11-17
  • Fabrication and electrochemical performance of nickel- and gadolinium-doped ceria-infiltrated La0·2Sr0·8TiO3 anodes for solid oxide fuel cells
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    Min-Jin Lee, Jae-Hwa Shin, Mi-Jung Ji, Hae-Jin Hwang

    In this work, nickel and gadolinium-doped ceria (GDC)-infiltrated lanthanum strontium titanate (LST) anodes are fabricated, and their electrode performances under a hydrogen atmosphere is investigated in terms of the Ni:GDC ratios and cell operating temperature. The Ni/GDC-infiltrated LST anode exhibits excellent electrode performance in comparison with the Ni- or GDC-infiltrated anodes, which is attributed to the synergistic effect of an extended triple-phase boundary length by GDC and good catalytic activity for hydrogen oxidation because of the Ni particles. The polarization resistances (Rp) of Ni/GDC-infiltrated LST are 0.07, 0.08, and 0.12 Ω cm2 at 800, 750, and 700 °C, respectively, which are approximately three orders of magnitude lower than that of the LST anode (68.5 Ω cm2 at 700 °C). The effect of Ni and GDC on the electrochemical performance of LST was also investigated by using electrochemical impedance spectroscopy (EIS). The anode polarization resistance (Rp) is confirmed to be dependent on the content and dispersion state (microstructure) of the Ni and GDC nanoparticles.

    更新日期:2017-11-17
  • The beneficial effects of straight open large pores in the support on steam electrolysis performance of electrode-supported solid oxide electrolysis cell
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    Jie Lin, Long Chen, Tong Liu, Changrong Xia, Chusheng Chen, Zhongliang Zhan

    This study is aimed at improving the electrochemical performance of electrode-supported solid oxide electrolysis cells (SOECs) by optimizing the pore structure of the supports. Two planar NiO–8 mol% yttria-stabilized zirconia supports are prepared, one by the phase-inversion tape casting, and the other by conventional tape casting method using graphite as the pore former. The former contains finger-like straight open large pores, while the latter contains randomly distributed and tortuous pores. The steam electrolysis of the cells with different microstructure cathode supports is measured. The cell supported on the cathode with straight pores shows a high current density of 1.42 A cm−2 and a H2 production rate of 9.89 mL (STP) cm−2 min−1 at 1.3 V and 50 vol % humidity and 750 °C, while the cell supported on the cathode with tortuous pores shows a current density of only 0.91 A cm−2 and a H2 production rate of 6.34 mL cm−2min−1. It is concluded that the introduction of large straight open pores into the cathode support allows fast gas phase transport and thus minimizes the concentration polarization. Furthermore, the straight pores could provide better access to the reaction site (the electrode functional layer), thereby reducing the activation polarization as well.

    更新日期:2017-11-17
  • Binder-free cobalt phosphate one-dimensional nanograsses as ultrahigh-performance cathode material for hybrid supercapacitor applications
    J. Power Sources (IF 6.395) Pub Date : 2017-11-15
    K. Vijaya Sankar, S.C. Lee, Y. Seo, C. Ray, S. Liu, A. Kundu, S.C. Jun
    更新日期:2017-11-17
  • Fabrication and performance of Li4Ti5O12/C Li-ion battery electrodes using combined double flame spray pyrolysis and pressure-based lamination technique
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    Michael Gockeln, Suman Pokhrel, Florian Meierhofer, Jens Glenneberg, Marco Schowalter, Andreas Rosenauer, Udo Fritsching, Matthias Busse, Lutz Mädler, Robert Kun
    更新日期:2017-11-15
  • Investigation of different anode materials for aluminium rechargeable batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-13
    David Muñoz-Torrero, Puiki Leung, Enrique García-Quismondo, Edgar Ventosa, Marc Anderson, Jesús Palma, Rebeca Marcilla
    更新日期:2017-11-15
  • Modified structural characteristics and enhanced electrochemical properties of oxygen-deficient Li2MnO3-δ obtained from pristine Li2MnO3
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    Xiao Tan, Rui Liu, Congxin Xie, Qiang Shen
    更新日期:2017-11-15
  • Mechanical characterization and durability of sintered porous transport layers for polymer electrolyte membrane electrolysis
    J. Power Sources (IF 6.395) Pub Date : 2017-11-13
    Elena Borgardt, Olha Panchenko, Franz Josef Hackemüller, Jürgen Giffin, Martin Bram, Martin Müller, Werner Lehnert, Detlef Stolten

    Differential pressure electrolysis offers the potential for more efficient hydrogen compression. Due to the differential pressures acting within the electrolytic cell, the porous transport layer (PTL) is subjected to high stress. For safety reasons, the PTL's mechanical stability must be ensured. However, the requirements for high porosity and low thickness stand in contrast to that for mechanical stability. Porous transport layers for polymer electrolyte membrane (PEM) electrolysis are typically prepared by means of the thermal sintering of titanium powder. Thus far, the factors that influence the mechanical strength of the sintered bodies and how all requirements can be simultaneously fulfilled have not been investigated. Here, the static and dynamic mechanical properties of thin sintered titanium sheets are investigated ex-situ via tensile tests and periodic loading in a test cell, respectively. In order for a sintered PTL with a thickness of 500 μm and porosities above 25% to be able to withstand 50 bar differential pressure in the cell, the maximum flow field width should be limited to 3 mm. Thus, a method was developed to test the suitability of PTL materials for use in electrolysis for various differential pressures and flow field widths.

    更新日期:2017-11-15
  • Post-test characterization of a solid oxide fuel cell stack operated for more than 30,000 hours: The cell
    J. Power Sources (IF 6.395) Pub Date : 2017-11-13
    Norbert H. Menzler, Doris Sebold, Olivier Guillon

    A four-layer solid oxide fuel cell stack with planar anode-supported cells was operated galvanostatically at 700 °C and 0.5Acm−2 for nearly 35,000 h. One of the four planes started to degrade more rapidly after ∼28,000 h and finally more progressively after ∼33,000 h. The stack was then shut down and a post-test analysis was carefully performed. The cell was characterized with respect to cathodic impurities and clarification of the reason(s) for failure. Wet chemical analysis revealed very low chromium incorporation into the cathode. However, SEM and TEM observations on polished and fractured surfaces showed catastrophic failure in the degraded layer. The cathode–barrier–electrolyte cell layer system delaminated from the entire cell over large areas. The source of delamination was the formation of a porous, sponge-like secondary phase consisting of zirconia, yttria and manganese (oxide). Large secondary phase islands grew from the electrolyte–anode interface towards the anode and cracked the bonding between both layers. The manganese originated from the contact or protection layers used on the air side. This stack result shows that volatile species – in this case manganese – should be avoided, especially when long-term applications are envisaged.

    更新日期:2017-11-15
  • Rational coating of Li7P3S11 solid electrolyte on MoS2 electrode for all-solid-state lithium ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    R.C. Xu, X.L. Wang, S.Z. Zhang, Y. Xia, X.H. Xia, J.B. Wu, J.P. Tu

    Large interfacial resistance between electrode and electrolyte limits the development of high-performance all-solid-state batteries. Herein we report a uniform coating of Li7P3S11 solid electrolyte on MoS2 to form a MoS2/Li7P3S11 composite electrode for all-solid-state lithium ion batteries. The as-synthesized Li7P3S11 processes a high ionic of 2.0 mS cm−1 at room temperature. Due to homogeneous union and reduced interfacial resistance, the assembled all-solid-state batteries with the MoS2/Li7P3S11 composite electrode exhibit higher reversible capacity of 547.1 mAh g−1 at 0.1 C and better cycling stability than the counterpart based on untreated MoS2. Our study provides a new reference for design/fabrication of advanced electrode materials for high-performance all-solid-state batteries.

    更新日期:2017-11-15
  • Introducing catalyst in alkaline membrane for improved performance direct borohydride fuel cells
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    Haiying Qin, Longxia Lin, Wen Chu, Wei Jiang, Yan He, Qiao Shi, Yonghong Deng, Zhenguo Ji, Jiabin Liu, Shanwen Tao
    更新日期:2017-11-15
  • Millimeter-wave irradiation heating for operation of doped CeO2 electrolyte-supported single solid oxide fuel cell
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    Salmie Suhana Binti Che Abdullah, Takashi Teranishi, Hidetaka Hayashi, Akira Kishimoto
    更新日期:2017-11-15
  • A variable capacitance based modeling and power capability predicting method for ultracapacitor
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    Chang Liu, Yujie Wang, Zonghai Chen, Qiang Ling

    Methods of accurate modeling and power capability predicting for ultracapacitors are of great significance in management and application of lithium-ion battery/ultracapacitor hybrid energy storage system. To overcome the simulation error coming from constant capacitance model, an improved ultracapacitor model based on variable capacitance is proposed, where the main capacitance varies with voltage according to a piecewise linear function. A novel state-of-charge calculation approach is developed accordingly. After that, a multi-constraint power capability prediction is developed for ultracapacitor, in which a Kalman-filter-based state observer is designed for tracking ultracapacitor's real-time behavior. Finally, experimental results verify the proposed methods. The accuracy of the proposed model is verified by terminal voltage simulating results under different temperatures, and the effectiveness of the designed observer is proved by various test conditions. Additionally, the power capability prediction results of different time scales and temperatures are compared, to study their effects on ultracapacitor's power capability.

    更新日期:2017-11-15
  • Three-dimensional computational fluid dynamics modelling and experimental validation of the Jülich Mark-F solid oxide fuel cell stack
    J. Power Sources (IF 6.395) Pub Date : 2017-11-14
    R.T. Nishida, S.B. Beale, J.G. Pharoah, L.G.J. de Haart, L. Blum
    更新日期:2017-11-15
  • Exceptional effect of glassy lithium fluorophosphate on Mn-rich olivine cathode material for high-performance Li ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-13
    Jongsoon Kim, Hyungsub Kim, Seung-Taek Myung, Jung-Keun Yoo, Seongsu Lee

    Mn-rich olivine LiFe0.3Mn0.7PO4 is homogenously encapsulated by an ∼3-nm-thick conductive nanolayer composed of the glassy lithium fluorophosphate through simple non-stoichiometric synthesis using additives of small amounts of LiF and a phosphorus source. The coating of the glassy lithium fluorophosphate nanolayer is clearly verified using transmission electron microscopy and X-ray photoelectron spectroscopy. It enables significant decrease in charge transfer resistance of LiFe0.3Mn0.7PO4 and improvement of its sluggish Li diffusion. At a rate of 10C, the LiFe0.3Mn0.7PO4 encapsulated by conductive glassy lithium fluorophosphate (LiFe0.3Mn0.7PO4-GLFP) electrode delivers a capacity of ∼130 mAh g−1, which is ∼77% of its theoretical capacity (∼170 mAh g−1) and ∼1.5 times higher than that of the pristine counterpart at 10C. Furthermore, LiFe0.3Mn0.7PO4-GLFP achieves outstanding cycle stability (∼75% retention of its initial capacity over 500 cycles at 1C). The proposed olivine LiFe0.3Mn0.7PO4-GLFP battery is thus expected to be a promising candidate for large-scale energy storage applications.

    更新日期:2017-11-14
  • The storage degradation of an 18650 commercial cell studied using neutron powder diffraction
    J. Power Sources (IF 6.395) Pub Date : 2017-11-11
    Po-Han Lee, She-huang Wu, Wei Kong Pang, Vanessa K. Peterson

    Commercial 18650 lithium ion cells containing a blended positive electrode of layered LiNi0.5Mn0.3Co0.2O2 and spinel Li1.1Mn1.9O4 alongside a graphite negative electrode were stored at various depth-of-discharge (DoD) at 60 °C for 1, 2, 4, and 6 months. After storage, the cells were cycled at C/25 at 25 °C between 2.75 and 4.2 V for capacity determination and incremental capacity analysis (ICA). In addition to ICA analysis, the mechanism for capacity fade was investigated by combining the results of neutron powder diffraction under in-situ and operando conditions, in conjunction with post-mortem studies of the electrodes using synchrotron X-ray powder diffraction and inductively-coupled plasma optical emission spectroscopy. Among the cells, those stored at 25% DoD suffered the highest capacity fade due to their higher losses of active Li, NMC, and LMO than cells stored at other DoD. The cells stored at 0% DoD shows second high capacity fade because they exhibit the highest of active LMO and graphite anode among the stored cells and higher losses of active Li and NMC than cells stored at 50% DoD.

    更新日期:2017-11-13
  • Synthesis of carbon-coated Na2MnPO4F hollow spheres as a potential cathode material for Na-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-11
    Ling Wu, Yong Hu, Xiaoping Zhang, Jiequn Liu, Xing Zhu, Shengkui Zhong
    更新日期:2017-11-13
  • Nano-engineered intrapores in nanoparticles of PtNi networks for increased oxygen reduction reaction activity
    J. Power Sources (IF 6.395) Pub Date : 2017-11-12
    Jieting Ding, Shan Ji, Hui Wang, Julian Key, Dan J.L. Brett, Rongfang Wang
    更新日期:2017-11-13
  • The effect of gradient boracic polyanion-doping on structure, morphology, and cycling performance of Ni-rich LiNi0.8Co0.15Al0.05O2 cathode material
    J. Power Sources (IF 6.395) Pub Date : 2017-11-09
    Tao Chen, Xiang Li, Hao Wang, Xinxiu Yan, Lei Wang, Bangwei Deng, Wujie Ge, Meizhen Qu
    更新日期:2017-11-11
  • Power capability evaluation for lithium iron phosphate batteries based on multi-parameter constraints estimation
    J. Power Sources (IF 6.395) Pub Date : 2017-11-10
    Yujie Wang, Rui Pan, Chang Liu, Zonghai Chen, Qiang Ling

    The battery power capability is intimately correlated with the climbing, braking and accelerating performance of the electric vehicles. Accurate power capability prediction can not only guarantee the safety but also regulate driving behavior and optimize battery energy usage. However, the nonlinearity of the battery model is very complex especially for the lithium iron phosphate batteries. Besides, the hysteresis loop in the open-circuit voltage curve is easy to cause large error in model prediction. In this work, a multi-parameter constraints dynamic estimation method is proposed to predict the battery continuous period power capability. A high-fidelity battery model which considers the battery polarization and hysteresis phenomenon is presented to approximate the high nonlinearity of the lithium iron phosphate battery. Explicit analyses of power capability with multiple constraints are elaborated, specifically the state-of-energy is considered in power capability assessment. Furthermore, to solve the problem of nonlinear system state estimation, and suppress noise interference, the UKF based state observer is employed for power capability prediction. The performance of the proposed methodology is demonstrated by experiments under different dynamic characterization schedules. The charge and discharge power capabilities of the lithium iron phosphate batteries are quantitatively assessed under different time scales and temperatures.

    更新日期:2017-11-11
  • Development of coin-type cell and engineering of its compartments for rechargeable seawater batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-11
    Jinhyup Han, Soo Min Hwang, Wooseok Go, S.T. Senthilkumar, Donghoon Jeon, Youngsik Kim

    Cell design and optimization of the components, including active materials and passive components, play an important role in constructing robust, high-performance rechargeable batteries. Seawater batteries, which utilize earth-abundant and natural seawater as the active material in an open-structured cathode, require a new platform for building and testing the cells other than typical Li-ion coin-type or pouch-type cells. Herein, we present new findings based on our optimized cell. Engineering the cathode components—improving the wettability of cathode current collector and seawater catholyte flow—improves the battery performance (voltage efficiency). Optimizing the cell component and design is the key to identifying the electrochemical processes and reactions of active materials. Hence, the outcome of this research can provide a systematic study of potentially active materials used in seawater batteries and their effectiveness on the electrochemical performance.

    更新日期:2017-11-11
  • Lithium ion batteries (NMC/graphite) cycling at 80 °C: Different electrolytes and related degradation mechanism
    J. Power Sources (IF 6.395) Pub Date : 2017-11-10
    R. Genieser, S. Ferrari, M. Loveridge, S.D. Beattie, R. Beanland, H. Amari, G. West, R. Bhagat
    更新日期:2017-11-11
  • A combined theoretical-experimental study of interactions between vanadium ions and Nafion membrane in all-vanadium redox flow batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-09
    Nadia N. Intan, Konstantin Klyukin, Tawanda J. Zimudzi, Michael A. Hickner, Vitaly Alexandrov
    更新日期:2017-11-11
  • Anode-originated SEI migration contributes to formation of cathode-electrolyte interphase layer
    J. Power Sources (IF 6.395) Pub Date : 2017-11-10
    Shuyu Fang, David Jackson, Mark L. Dreibelbis, Thomas F. Kuech, Robert J. Hamers
    更新日期:2017-11-11
  • Enabling bis(fluorosulfonyl)imide-based ionic liquid electrolytes for application in dual-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-11
    Kolja Beltrop, Xin Qi, Tobias Hering, Stephan Röser, Martin Winter, Tobias Placke
    更新日期:2017-11-11
  • Thermal effects of planar high temperature heat pipes in solid oxide cell stacks operated with internal methane reforming
    J. Power Sources (IF 6.395) Pub Date : 2017-11-09
    Marius Dillig, Thomas Plankenbühler, Jürgen Karl
    更新日期:2017-11-11
  • Highly efficient visible-light driven photocatalytic hydrogen production from a novel Z-scheme Er3+:YAlO3/Ta2O5-V5+||Fe3+-TiO2/Au coated composite
    J. Power Sources (IF 6.395) Pub Date : 2017-11-09
    Guowei Wang, Xue Ma, Shengnan Wei, Siyi Li, Jing Qiao, Jun Wang, Youtao Song
    更新日期:2017-11-11
  • Porous SnO2-CuO nanotubes for highly reversible lithium storage
    J. Power Sources (IF 6.395) Pub Date : 2017-11-06
    Jun Young Cheong, Chanhoon Kim, Ji-Won Jung, Ki Ro Yoon, Il-Doo Kim
    更新日期:2017-11-10
  • Electrochemical behavior of LiV3O8 positive electrode in hybrid Li,Na–ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    S. Maletti, A. Sarapulova, A.A. Tsirlin, S. Oswald, F. Fauth, L. Giebeler, N.N. Bramnik, H. Ehrenberg, D. Mikhailova
    更新日期:2017-11-10
  • A quick on-line state of health estimation method for Li-ion battery with incremental capacity curves processed by Gaussian filter
    J. Power Sources (IF 6.395) Pub Date : 2017-11-07
    Yi Li, Mohamed Abdel-Monem, Rahul Gopalakrishnan, Maitane Berecibar, Elise Nanini-Maury, Noshin Omar, Peter van den Bossche, Joeri Van Mierlo

    This paper proposes an advanced state of health (SoH) estimation method for high energy NMC lithium-ion batteries based on the incremental capacity (IC) analysis. IC curves are used due to their ability of detect and quantify battery degradation mechanism. A simple and robust smoothing method is proposed based on Gaussian filter to reduce the noise on IC curves, the signatures associated with battery ageing can therefore be accurately identified. A linear regression relationship is found between the battery capacity with the positions of features of interest (FOIs) on IC curves. Results show that the developed SoH estimation function from one single battery cell is able to evaluate the SoH of other batteries cycled under different cycling depth with less than 2.5% maximum errors, which proves the robustness of the proposed method on SoH estimation. With this technique, partial charging voltage curves can be used for SoH estimation and the testing time can be therefore largely reduced. This method shows great potential to be applied in reality, as it only requires static charging curves and can be easily implemented in battery management system (BMS).

    更新日期:2017-11-10
  • Electrochemical performance of lithium-ion capacitors evaluated under high temperature and high voltage stress using redox stable electrolytes and additives
    J. Power Sources (IF 6.395) Pub Date : 2017-11-06
    Jonathan Boltersdorf, Samuel A. Delp, Jin Yan, Ben Cao, Jim P. Zheng, T. Richard Jow, Jeffrey A. Read
    更新日期:2017-11-10
  • A combined theoretical and experimental study on the oxygenated graphitic carbon nitride as a promising sulfur host for lithium–sulfur batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-06
    Feng He, Kai Li, Cong Yin, Yingchun Ding, Hao Tang, Ying Wang, Zhijian Wu
    更新日期:2017-11-10
  • Molecular simulations of electrolyte structure and dynamics in lithium–sulfur battery solvents
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Chanbum Park, Matej Kanduč, Richard Chudoba, Arne Ronneburg, Sebastian Risse, Matthias Ballauff, Joachim Dzubiella
    更新日期:2017-11-10
  • Carbon deposition and sulfur poisoning during CO2 electrolysis in nickel-based solid oxide cell electrodes
    J. Power Sources (IF 6.395) Pub Date : 2017-11-07
    Theis Løye Skafte, Peter Blennow, Johan Hjelm, Christopher Graves
    更新日期:2017-11-10
  • Incorporation of Co into MoS2/graphene nanocomposites: One effective way to enhance the cycling stability of Li/Na storage
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Xiaomin Li, Zhenxing Feng, Jiantao Zai, Zi-Feng Ma, Xuefeng Qian
    更新日期:2017-11-10
  • Investigating continuous co-intercalation of solvated lithium ions and graphite exfoliation in propylene carbonate-based electrolyte solutions
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Hee-Youb Song, Soon-Ki Jeong

    Forming an effective solid electrolyte interphase (SEI) is a significant issue in lithium ion batteries that utilize graphite as a negative electrode material, because the SEI determines the reversibility of the intercalation and de-intercalation of lithium ions into graphite for secondary batteries. In propylene carbonate (PC)-based electrolyte solutions, ceaseless co-intercalation of solvated lithium ions takes place because no effective SEI is formed. It is indisputable that this continuous co-intercalation leads to graphite exfoliation; however, the reason for this is currently not well understood. In this study, we investigate interfacial reactions that contribute to SEI formation on highly oriented pyrolytic graphite (HOPG) in ethylene carbonate (EC) and PC-based electrolyte solutions by in situ atomic force microscopy. The blisters formed on HOPG after the decomposition of solvated lithium ions within the graphite layers do not change over the course of ten electrochemical cycles in an EC-based electrolyte solution. In contrast, when cycling in PC-based electrolytes, the blisters continually change, and the height at the vicinity of the graphite edge plane increases. These morphological changes are attributed to the continuous co-intercalation of solvated lithium ions in PC-based electrolyte solutions.

    更新日期:2017-11-10
  • A thermally regenerative ammonia battery with carbon-silver electrodes for converting low-grade waste heat to electricity
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Mohammad Rahimi, Taeyoung Kim, Christopher A. Gorski, Bruce E. Logan
    更新日期:2017-11-10
  • Oxygen reduction reaction of (C-PCTNB@CNTs): A nitrogen and phosphorus dual-doped carbon electro-catalyst derived from polyphosphazenes
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Sami Ullah Dar, Muhammad Aizaz Ud Din, Muhammad Usman Hameed, Shafqat Ali, Raheel Akram, Zhanpeng Wu, Dezhen Wu
    更新日期:2017-11-10
  • Models for Microbial Fuel Cells: A critical review
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Chengshuo Xia, Daxing Zhang, Witold Pedrycz, Yingmin Zhu, Yongxian Guo

    Microbial fuel cells (MFCs) have been widely viewed as one of the most promising alternative sources of renewable energy. A recognition of needs of efficient development methods based on multidisciplinary research becomes crucial for the optimization of MFCs. Modeling of MFCs is an effective way for not only gaining a thorough understanding of the effects of operation conditions on the performance of power generation but also becomes of essential interest to the successful implementation of MFCs. The MFC models encompass the underlying reaction process and limiting factors of the MFC. The models come in various forms, such as the mathematical equations or the equivalent circuits. Different modeling focuses and approaches of the MFC have emerged. In this study, we present a state of the art of MFCs modeling; the past modeling methods are reviewed as well. Models and modeling methods are elaborated on based on the classification provided by Mechanism-based models and Application-based models. Mechanisms, advantages, drawbacks, and application fields of different models are illustrated as well. We exhibit a complete and comprehensive exposition of the different models for MFCs and offer further guidance to promote the performance of MFCs.

    更新日期:2017-11-10
  • Multi-modal porous microstructure for high temperature fuel cell application
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    T. Wejrzanowski, S. Haj Ibrahim, K. Cwieka, M. Loeffler, J. Milewski, E. Zschech, C.-G. Lee
    更新日期:2017-11-10
  • A photo-assisted microbial electrolysis cell for the exclusive biohydrogen production using a MoS2-coated p-type copper oxide
    J. Power Sources (IF 6.395) Pub Date : 2017-11-08
    Yongwon Jeon, Jun Hyun Kim, Kyoungmin Koo, Sunghyun Kim
    更新日期:2017-11-10
  • Tailoring Ba3Ca1.18Nb1.82O9-δ with NiO as electrolyte for proton-conducting solid oxide fuel cells
    J. Power Sources (IF 6.395) Pub Date : 2017-11-09
    Zhiwen Zhu, Enyan Guo, Zhaoling Wei, Huiqiang Wang

    A strategy of tailoring Ba3Ca1.18Nb1.82O9-δ (BCN) is proposed, aiming to improve the sinterability and conductivity of BCN material for fuel cell applications. The new Ba3Ca1.18Nb1.77Ni0.05O9-δ (BCNNi) material shows a significant improvement in sinterability compared with BCN, leading to a high densification for BCNNi after sintering at as low as 1400 °C. In addition, the BCNNi exhibits a conductivity of 4.59 × 10−3 S cm−1 at 700 °C that is not only higher than that for BCN which only reaches 3.45 × 10−3 S cm−1 at the same temperature but also shows a significant improvement compared with that for BCN-based materials in literature reports. As a result, the cell with the BCNNi electrolyte shows a peak power density of 84 mW cm−2 at 700 °C which is also one of the largest ever reported for this type of cells. Further electrochemical studies indicate that the high conductivity of BCNNi electrolyte membrane benefits the fuel cell performance.

    更新日期:2017-11-10
  • Calendar aging of a 250 kW/500 kWh Li-ion battery deployed for the grid storage application
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Pierre Kubiak, Zhaohui Cen, Carmen M. López, Ilias Belharouak

    The introduction of Li-ion batteries for grid applications has become evidence as the cost per kWh is continuously decreasing. Although the Li-ion battery is a mature technology for automotive applications and portable electronics, its use for stationary applications needs more validation. The Li-ion technology is considered safe enough for grid storage application, but its lifetime is generally evaluated to be around 10 years. Higher market penetration will be achieved if a longer lifespan could be demonstrated. Therefore, aging evaluation of the batteries becomes crucial. In this paper we investigated the effects of aging after a three years' standby field deployment of a 250 kW/500 kWh Li-ion battery integrated with the grid and solar farm under the harsh climate conditions of Qatar. The development of tools for acquisition and analysis of data from the battery management system (BMS) allows the assessment of the battery performance at the battery stack, string and cell levels. The analysis of the residual capacity after aging showed that the stack suffered from a low decrease of capacity, whereas some inconsistencies have been found between the strings. These inconsistencies are caused by misalignment of a small number of cells that underwent self-discharge during standby at high state of charge.

    更新日期:2017-11-10
  • Hierarchically structured graphene-carbon nanotube-cobalt hybrid electrocatalyst for seawater battery
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Dong Hoon Suh, Sul Ki Park, Puritut Nakhanivej, Youngsik Kim, Soo Min Hwang, Ho Seok Park
    更新日期:2017-11-10
  • Co/Ti co-substituted layered LiNiO2 prepared using a concentration gradient method as an effective cathode material for Li-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Hyoung Shin Ko, Jea Han Kim, Juan Wang, Jong Dae Lee

    The design of Li-ion batteries with high energy storage capacities and efficiencies is a subject of increased research interest, being of key importance for their large-scale applications and further commercialization. However, conventional Li-ion batteries are expensive and have stability-related concerns, which limit their practical applications. In our search for cheaper and safer Li-ion batteries, we use a concentration gradient method to prepare LiNi0.9Co0.1–xTixO2 (0.02 ≤ x ≤ 0.05) cathode materials surface-enriched with Co and Ti that exhibit decreased oxygen loss and improved structural stability. The corresponding crystal structures and morphologies are analyzed by X-ray diffraction and field emission scanning electron microscopy, with the Ni, Co, and Ti concentration distributions determined by energy-dispersive X-ray spectroscopy. The material with the best performance (x = 0.04) exhibits a discharge capacity of 214 mAh g−1 in a charge/discharge voltage range of 3.0–4.3 V (vs. Li/Li+), and possesses an excellent 50-cycle capacity retention of 98.7%. Thermogravimetric analysis shows that partial substitution of Ni with the strongly oxophilic Ti solves the problem of oxygen loss observed in Ni-rich cathode materials such as LiNiO2.

    更新日期:2017-11-10
  • Self-balancing feature of Lithium-Sulfur batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Vaclav Knap, Daniel-Ioan Stroe, Andreas E. Christensen, Karsten Propp, Abbas Fotouhi, Daniel J. Auger, Erik Schaltz, Remus Teodorescu

    The Li-S batteries are a prospective battery technology, which despite to its currently remaining drawbacks offers useable performance and interesting features. The polysulfide shuttle mechanism, a characteristic phenomenon for the Li-S batteries, causes a significant self-discharge at higher state-of-charge (SOC) levels, which leads to the energy dissipation of cells with higher charge. In an operation of series-connected Li-S cells, the shuttle mechanism results into a self-balancing effect which is studied here. A model for prediction of the self-balancing effect is proposed in this work and it is validated by experiments. Our results confirm the self-balancing feature of Li-S cells and illustrate their dependence on various conditions such as temperature, charging limits and idling time at high SOC.

    更新日期:2017-11-10
  • Composite electrolytes of polyethylene oxides/garnets interfacially wetted by ionic liquid for room-temperature solid-state lithium battery
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Hanyu Huo, Ning Zhao, Jiyang Sun, Fuming Du, Yiqiu Li, Xiangxin Guo
    更新日期:2017-11-10
  • Triphenyl borate as a bi-functional additive to improve surface stability of Ni-rich cathode material
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Taeeun Yim, Seol Heui Jang, Young-Kyu Han
    更新日期:2017-11-10
  • In-situ time-of-flight neutron diffraction study of the structure evolution of electrode materials in a commercial battery with LiNi0.8Co0.15Al0.05O2 cathode
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    I.A. Bobrikov, N.Yu. Samoylova, S.V. Sumnikov, O.Yu. Ivanshina, R.N. Vasin, A.I. Beskrovnyi, A.M. Balagurov
    更新日期:2017-11-10
  • Does size matter – What other factors are limiting the rate performance of Na3V2(PO4)3 cathode in sodium-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Xi Jiang, Tianran Zhang, Jim Yang Lee
    更新日期:2017-11-10
  • Toward greener lithium-ion batteries: Aqueous binder-based LiNi0.4Co0.2Mn0.4O2 cathode material with superior electrochemical performance
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Zhen Chen, Guk-Tae Kim, Dongliang Chao, Nicholas Loeffler, Mark Copley, Jianyi Lin, Zexiang Shen, Stefano Passerini
    更新日期:2017-11-10
  • FeSi4P4: A novel negative electrode with atypical electrochemical mechanism for Li and Na-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Gaël Coquil, Julien Fullenwarth, Gal Grinbom, Moulay Tahar Sougrati, Lorenzo Stievano, David Zitoun, Laure Monconduit

    The electrochemical mechanism and performance of FeSi4P4, vs. Na and Li were studied using a combination of operando X-ray diffraction, 57Fe Mössbauer spectroscopy, and SQUID magnetometry. This silicon- and phosphorous-rich material exhibits a high capacity of 1750 mAh/g, retaining 1120 mAh/g after 40 cycles, and reacts through an original reversible mechanism surprisingly involving only slight changes in the chemical environment of the iron. Magnetic measurements and 57Fe Mössbauer spectroscopy at low temperature reveal the reversible but incomplete change of the magnetic moment upon charge and discharge. Such a mild reversible process without drastic phase transition (with the exception of the crystalline to amorphous transition during the first lithiation) can explain the satisfying capacity retention. The electrochemical mechanism appears thus to be significantly different from the classical conversion or alloying/dealloying mechanisms usually observed in Lithium ion batteries for p-group element based materials. The same iron silicon phosphide electrode shows also interesting but significantly lower performance vs. Na, with a limited capacity retention 350 mAh/g.

    更新日期:2017-11-10
  • Electroactive ionic liquids based on 2,5-ditert-butyl-1,4-dimethoxybenzene and triflimide anion as redox shuttle for Li4Ti5O12/LiFePO4 lithium-ion batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Bruno Gélinas, Thomas Bibienne, Mickael Dollé, Dominic Rochefort

    In order to increase the solubility and oxidation potential of redox shuttles, electroactive ionic liquids (RILs) based on the modification of 1,4-dimethoxybenzene with triflimide anions were synthesized. We developed two synthetic routes to obtain these RILs in which the triflimide was either linked on the benzene ring or as a ether on 2,5-ditert-butyl-1,4-dimethoxybenzene (DDB). These RILs all have melting points below 100 °C, but above room temperature. The structural impact of electroactive anion was evaluated in this study by determining the redox potential and electrochemical stability. The electrochemical properties of these RILs were investigated by cyclic voltammetry and the diffusion coefficients were measured by double potential step chronoamperometry. The viscosity and ionic conductivity measurements of redox-active electrolyte were obtained at different temperatures and the RIL additives are shown to have a low impact on these electrolyte properties at concentrations up to 0.3 M. The charge-overcharge-discharge cycles of Li/LiFePO4 half-cells and Li4Ti5O12/LiFePO4 full cells with a 100% overcharge are presented using redox-active electrolyte (0.3 M concentration level) at 0.1 C rate. This study highlights the potential of electroactive ionic liquids as highly soluble and stable functional additives in Li-ion battery electrolytes.

    更新日期:2017-11-10
  • Na3.4Zr1.8Mg0.2Si2PO12 filled poly(ethylene oxide)/Na(CF3SO2)2N as flexible composite polymer electrolyte for solid-state sodium batteries
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Zhizhen Zhang, Kaiqi Xu, Xiaohui Rong, Yong-Sheng Hu, Hong Li, Xuejie Huang, Liquan Chen

    Solid electrolytes with high ionic conductivity and excellent electrochemical stability are of prime significance to enable the application of solid-state batteries in energy storage and conversion. In this study, solid composite polymer electrolytes (CPEs) based on sodium bis(trifluorosulfonyl) imide (NaTFSI) and poly (ethylene oxide) (PEO) incorporated with active ceramic filler (NASICON) are reported for the first time. With the addition of NASICON fillers, the thermal stability and electrochemical stability of the CPEs are improved. A high conductivity of 2.8 mS/cm (at 80 °C) is readily achieved when the content of the NASICON filler in the composite polymer reaches 50 wt%. Furthermore, Na3V2(PO4)3/CPE/Na solid-state batteries using this composite electrolyte display good rate and excellent cycle performance.

    更新日期:2017-11-10
  • Investigation of lithium ion battery electrolytes containing flame retardants in combination with the film forming electrolyte additives vinylene carbonate, vinyl ethylene carbonate and fluoroethylene carbonate
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Tim Dagger, Martin Grützke, Matthias Reichert, Jan Haetge, Sascha Nowak, Martin Winter, Falko M. Schappacher

    In order to address the trade-off between the safety lithium ion battery (LIB) electrolytes and their electrochemical performance, synergetic effects of flame retardant additives (FRs) in combination with film forming additives (FFAs) are investigated. Triphenyl phosphate (TPP) and a silicon-containing additive (WA) are applied as FRs to improve the onset temperature of the thermal runaway of a LIB standard electrolyte (LP57: 1 M LiPF6 in EC:EMC 3:7) about 15 K and 28 K, respectively. The application of the FRs in MCMB graphite/lithium metal and NMC111/lithium metal three-electrode cells induces insufficiencies in terms of charge/discharge cycling stability and rate capability.It is investigated if the addition of FFAs can degrade the insufficiencies that are induced by the FRs. Vinylene carbonate, vinyl ethylene carbonate and fluoroethylene carbonate are added to a mixture of LP57 with 10% FR to enhance the cycling performance via improved interphase formation. Results reveal, that the rate capability of cells containing TPP or WA is especially improved by addition of 2% or 5% FEC, respectively.Postmortem analyses of the electrodes by SEM and of the electrolyte by GC-MS are performed. Direct correlations between the cycling behavior during the C-rate study and the electrolyte decomposition products are drawn.

    更新日期:2017-11-10
  • Zinc electrodeposition from flowing alkaline zincate solutions: Role of hydrogen evolution reaction
    J. Power Sources (IF 6.395) Pub Date : 2017-11-05
    Jan Dundálek, Ivo Šnajdr, Ondřej Libánský, Jiří Vrána, Jaromír Pocedič, Petr Mazúr, Juraj Kosek

    The hydrogen evolution reaction is known as a parasitic reaction during the zinc electrodeposition from alkaline zincate solutions and is thus responsible for current efficiency losses during the electrolysis. Besides that, the rising hydrogen bubbles may cause an extra convection within a diffusion layer, which leads to an enhanced mass transport of zincate ions to an electrode surface. In this work, the mentioned phenomena were studied experimentally in a flow through electrolyzer and the obtained data were subsequently evaluated by mathematical models. The results prove the indisputable influence of the rising hydrogen bubbles on the additional mixing of the diffusion layer, which partially compensates the drop of the current efficiency of the zinc deposition at higher current flows. Moreover, the results show that the current density ratio (i.e., the ratio of an overall current density to a zinc limiting current density) is not suitable for the description of the zinc deposition, because the hydrogen evolution current density is always involved in the overall current density.

    更新日期:2017-11-10
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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