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High-performance battery-type Fe1-xS@CFs anode for all-solid-state battery-type asymmetric supercapacitor with high energy density and wide working temperature range
Applied Surface Science ( IF 6.7 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.apsusc.2020.147817
Ziqian Ma , Zhiqin Sun , Fengyu Qu

Abstract Pseudo-capacitive materials with high performance are always combined with carbon-based materials applying for supercapacitors, which can realize satisfactory properties of energy storage while excellent cycle life. Enhancing electrochemical performance of anodes following the method is an effective method to get high energy densities. Herein, Fe1-xS grown on carbon nanofibers (Fe1-xS/CFs) through electrospinning and calcination approach, possesses excellent electrochemical properties when it serves as the anode for asymmetric supercapacitors. The specific capacity of which can reach up to 238 mAh g−1 (1 A g−1) while remain 95.3 mAh g−1 at 15 A g−1. The retention rate of the anode can retain 78.5% after 5000 cycles. Considering high performance of anode, NiCo2S4/NCTs with a high specific capacity of 203 mAh g−1 (1 A g−1) was selected as the cathode applying for all-solid-state battery-type asymmetric supercapacitor to get high energy density. Benefitting from excellent properties of both anode and cathode, as-fabricated all-solid-state battery-type asymmetric supercapacitor possesses high energy density of 55.4 Wh kg−1 at the power density of 882 W kg−1 with remarkable cyclic performance (80.6% after 5000 cycles). More important, all-solid-state battery-type asymmetric supercapacitor NiCo2S4/NCTs//Fe1-xS/CFs-5 can work with a wide temperature range (−10 to 60 °C), which can display a specific capacity of 40.4 mAh g−1 at 1 A g−1 in −10 °C and 112.3 mAh g−1 in 60 °C. All these results indicate that as-fabricated NiCo2S4/NCTs//Fe1-xS/CFs-5 battery-type asymmetric supercapacitor possesses great potential for future applications.

中文翻译:

用于具有高能量密度和宽工作温度范围的全固态电池型非对称超级电容器的高性能电池型Fe1-xS@CFs阳极

摘要 高性能的伪电容材料与应用于超级电容器的碳基材料相结合,可以实现令人满意的储能性能和优异的循环寿命。按照该方法提高阳极的电化学性能是获得高能量密度的有效方法。在此,通过静电纺丝和煅烧方法在碳纳米纤维(Fe1-xS/CFs)上生长的 Fe1-xS 作为非对称超级电容器的阳极具有优异的电化学性能。其比容量可高达 238 mAh g-1 (1 A g-1),而在 15 A g-1 时仍保持 95.3 mAh g-1。5000次循环后阳极的保留率可保留78.5%。考虑到阳极的高性能,选择具有 203 mAh g-1 (1 A g-1) 高比容量的 NiCo2S4/NCTs 作为阴极,应用于全固态电池型非对称超级电容器以获得高能量密度。受益于正极和负极的优异性能,制造的全固态电池型非对称超级电容器在 882 W kg-1 的功率密度下具有 55.4 Wh kg-1 的高能量密度,并具有显着的循环性能(80.6% 5000 次循环后)。更重要的是,全固态电池型非对称超级电容器NiCo2S4/NCTs//Fe1-xS/CFs-5可在较宽的温度范围内(-10至60°C)工作,可显示40.4 mAh的比容量g-1 at 1 A g-1 in -10 °C 和 112.3 mAh g-1 in 60 °C。
更新日期:2021-01-01
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