PNb9O25 nanofiber as a high-voltage anode material for advanced lithium ions batteries

doi:10.1016/j.jmat.2020.07.003

Journal of Materiomics

Volume 6, Issue 4, December 2020, Pages 781-787

https://doi.org/10.1016/j.jmat.2020.07.003 Get rights and content

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Highlights

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PNb₉O₂₅ nanofiber is synthesized via a facile electrospinning approach.
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PNb₉O₂₅ nanofiber consists of numerous inter-connected nanocrystals.
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PNb₉O₂₅ nanofiber display superior performance to bulk PNb₉O₂₅.
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Lithium storage mechanism of PNb₉O₂₅ upon cycling is analyzed by ex situ XPS.
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PNb₉O₂₅ nanofiber is used to construct the full cell with LiCoO₂ as cathode.

Abstract

If the operating voltage of anode materials is below 1.0 V versus Li⁺/Li, the side reaction between electrolyte and anode materials will occur extensively. Thus, high-voltage anode materials have aroused interest recently. In this work, we report the preparation of PNb₉O₂₅ nanofiber via a facile electrospinning method. The PNb₉O₂₅ nanofiber shows the high rate performance and excellent cycling performance when it is used as anode in lithium ions batteries. For instance, the PNb₉O₂₅ nanofiber can deliver a capacity of 233, 212.1, 193.8, and 181.4 mA h g⁻¹ at 0.2, 1, 3, and 6C, respectively. After 1000 cycles, it can reach at 134.3 mA h g⁻¹ with capacity retention of 70.9%. Meanwhile, the ex situ X-ray photoelectron spectroscopy technique has been adopted to investigate the evolution in valence state of each element for PNb₉O₂₅ nanofiber. In addition, the PNb₉O₂₅ nanofiber is chosen as the anode material in lithium ion full cell in this work, demonstrating the potential for practical application.

Graphical abstract

Keywords

PNb₉O₂₅

Nanofiber

Electrospinning

Anode

Lithium ion batteries

Cited by (0)

Haoxiang Yu received his M.S. degree in Physical Chemistry from Ningbo University and he is now pursuing his Ph.D degree. He has published 23 papers in peer-reviewing journals including Nano Energy, ACS Applied Materials & Interfaces, and Journal of Power Sources. His current research focuses on advanced materials for energy conversion and storage.

Jundong Zhang received his B.S. degree in Chemistry from Nanchang Hangkong University in 2017. He is currently a Master candidate at Ningbo University. He is interested in preparing metal chalcogenides for energy storage.

Maoting Xia has graduated from Quzhou University in 2018. She is currently a Master candidate at Ningbo University. Her current research focuses on nanomaterials for rechargeable batteries.

Chenchen Deng is now pursuing her B.S. degree at Ningbo university. Her current research focuses on the design and synthesis of nanomaterials, and investigation of their fundamental properties and applications in energy storage devices.

Xikun Zhang has graduated from Fuyang Normal University in 2017 and he is currently a Master candidate at Ningbo University. His current research focuses on metal oxides and sulfides for electrochemical energy storage devices.

Runtian Zheng received his B.S. degree in Chemistry from Xinyang Normal University in 2017 and he is now pursuing her M.S. degree at Ningbo university. His current research focuses on the design and synthesis of nanomaterials, and investigation of their fundamental properties and applications in energy storage devices.

Shi Chen is now pursuing his M.S. degree at Ningbo university. His current research focuses on the design and synthesis of nanomaterials, and investigation of their fundamental properties and applications in energy storage devices.

Jie Shu is currently a full professor at Ningbo University. He received his Ph.D degree from Institute of Physics, Chinese Academy of Sciences in 2007. He ever worked as a postdoctoral researcher at National Institute of Advanced Industrial Science and Technology (Japan), Université de Picardie Jules Verne and Centre national de la recherché scientifique (France). He has published more than 200 papers, 2 book chapters, and 30 patents about energy storage materials.

Zhen-Bo Wang has obtained B.S., M.S and PhD degrees from Harbin Institute of Technology in 1998, 2003 and 2006 respectively. He completed a post-doctoral stint at the University of Puerto Rico in the US from 2006 to 2007. He is now a full professor in the School of Chemistry and Chemical Engineering at Harbin Institute of Technology and doctoral student advisor. He is researcher in the Heilongjiang Province Industrial Technology Research Centre. Research interests lie in chemical power sources, electrocatalysis and nanoelectrode materials.

: Peer review under responsibility of The Chinese Ceramic Society.