Sodium storage mechanism of a GeP5/C composite as a high capacity anode material for sodium-ion batteries

Mao-Hui Zhang; Jing-Ke Meng; Na Xiao; Rui-Wen Shao; Xiao-Jing Wu; Peng Gao; Zulipiya Shadike; Yong-Ning Zhou

doi:10.1039/D2CC03728A

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Sodium storage mechanism of a GeP₅/C composite as a high capacity anode material for sodium-ion batteries†

Mao-Hui Zhang,‡^ab Jing-Ke Meng,‡^ac Na Xiao,^a Rui-Wen Shao,*^d Xiao-Jing Wu,^a Peng Gao,

^e Zulipiya Shadike*^f and Yong-Ning Zhou

*^a

Author affiliations

* Corresponding authors

^a Department of Materials Science, Fudan University, Shanghai, China
E-mail: ynzhou@fudan.edu.cn

^b State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, Shanghai, China

^c Institute of New Energy Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, China

^d Beijing Advanced Innovation Center for Intelligent Robots and Systems and School of Medical Technology, Beijing Institute of Technology, Beijing, China
E-mail: rwshao@bit.edu.cn

^e Electron Microscopy Laboratory, School of Physics, Peking University, Beijing, China

^f Institute of Fuel Cells, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, China
E-mail: zshadike@sjtu.edu.cn

Abstract

The sodium storage mechanism of a GeP₅/C composite electrode was revealed. Metallic Ge formed during discharge enhances the electronic conductivity of the electrode, while Na_xP mitigates the agglomeration and volume change of Ge in the alloying process. The GeP₅ phase is regenerated after recharge along with elemental Ge and P, implying a reversible phase transition of GeP₅ during cycling.

This article is part of the themed collection: Electrochemical Energy

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Article information

DOI: https://doi.org/10.1039/D2CC03728A
Article type: Communication
Submitted: 05 Jul 2022
Accepted: 19 Ago 2022
First published: 20 Ago 2022

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Chem. Commun., 2022,58, 10345-10348

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Sodium storage mechanism of a GeP₅/C composite as a high capacity anode material for sodium-ion batteries

M. Zhang, J. Meng, N. Xiao, R. Shao, X. Wu, P. Gao, Z. Shadike and Y. Zhou, Chem. Commun., 2022, 58, 10345 DOI: 10.1039/D2CC03728A

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