期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 11, 期 13, 页码 7170-7178出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta09078c
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The study investigated a new high-performance titanyl germanate anode, Rb4Li2TiOGe4O12 (RLTG), for lithium-ion storage properties. Due to the multi-electron reactions of Ti and Ge and the polyanion framework, RLTG exhibits a high discharge specific capacity and decent capacity retention performance. In addition, RLTG shows a good rate capability in a wide range of current densities. Furthermore, detailed analysis of discharge/charge behaviors was conducted using various techniques and calculations.
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.
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