Alkaline earth metal vanadates as sodium-ion battery anodes

Xiaoming Xu, Chaojiang Niu (), Manyi Duan, Xuanpeng Wang, Lei Huang, Junhui Wang, Liting Pu, Wenhao Ren, Changwei Shi, Jiasheng Meng, Bo Song () and Liqiang Mai ()
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Xiaoming Xu: Wuhan University of Technology
Chaojiang Niu: Wuhan University of Technology
Manyi Duan: Sichuan Normal University
Xuanpeng Wang: Wuhan University of Technology
Lei Huang: Wuhan University of Technology
Junhui Wang: Wuhan University of Technology
Liting Pu: Wuhan University of Technology
Wenhao Ren: Wuhan University of Technology
Changwei Shi: Wuhan University of Technology
Jiasheng Meng: Wuhan University of Technology
Bo Song: School of Optical-Electrical Computer Engineering, University of Shanghai for Science and Technology
Liqiang Mai: Wuhan University of Technology

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract The abundance of sodium resources indicates the potential of sodium-ion batteries as emerging energy storage devices. However, the practical application of sodium-ion batteries is hindered by the limited electrochemical performance of electrode materials, especially at the anode side. Here, we identify alkaline earth metal vanadates as promising anodes for sodium-ion batteries. The prepared calcium vanadate nanowires possess intrinsically high electronic conductivity (> 100 S cm−1), small volume change ( 300 mAh g−1), with an average voltage of ∼1.0 V. The specific sodium-storage mechanism, beyond the conventional intercalation or conversion reaction, is demonstrated through in situ and ex situ characterizations and theoretical calculations. This work explores alkaline earth metal vanadates for sodium-ion battery anodes and may open a direction for energy storage.

Date: 2017
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DOI: 10.1038/s41467-017-00211-5

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