Rb4Li2TiOGe4O12: a novel high-performance titanyl germanate anode for Li-ion batteries. Issue 13 (15th March 2023)

• Record Type: Journal Article
• Authors: Tang, Chuan; Chang, Siliang; Wu, Qian; Kang, Lei; Feng, Kai; Meng, Xianghe; Chu, Shengqi; Huang, Hongwei; Xia, Mingjun
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 13(2023)
• Page Start: 7170
• Page End: 7178
• Publication Date: 2023-03-15
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta09078c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A polar polyanionic germanate Rb4 Li2 TiOGe4 O12 was proposed as a new high-performance anode for Li-ion batteries. It has balanced electrochemical properties with higher specific capacity and lower operating voltage, among the titanyl-based anodes. 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, Rb4 Li2 TiOGe4 O12 (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.