Issue 13, 2023

Rb4Li2TiOGe4O12: a novel high-performance titanyl germanate anode for Li-ion batteries

Abstract

The design of high-performance anode materials is the key to improving the performance of lithium-ion batteries. Here, a new high-performance titanyl germanate anode, Rb4Li2TiOGe4O12 (RLTG), was investigated for lithium-ion storage properties for the first time. Thanks to the multi-electron reactions of Ti and Ge and the polyanion framework, RLTG exhibits a high discharge specific capacity of 786.2 mA h g−1 and decent capacity retention performance of 84%. In addition, RLTG shows a good rate capability in the range of 0.05–2.5 A g−1. Furthermore, the discharge/charge behaviors were explored in depth by a cyclic voltammetry test, galvanostatic intermittent titration technique, X-ray absorption near-edge spectroscopy and electrochemical impedance spectroscopy, combined with first-principles calculations.

Graphical abstract: Rb4Li2TiOGe4O12: a novel high-performance titanyl germanate anode for Li-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
21 Nov 2022
Accepted
01 Mar 2023
First published
01 Mar 2023

J. Mater. Chem. A, 2023,11, 7170-7178

Rb4Li2TiOGe4O12: a novel high-performance titanyl germanate anode for Li-ion batteries

C. Tang, S. Chang, Q. Wu, L. Kang, K. Feng, X. Meng, S. Chu, H. Huang and M. Xia, J. Mater. Chem. A, 2023, 11, 7170 DOI: 10.1039/D2TA09078C

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