Preparation and electrochemical performance of Ag doped Li4Ti5O12

被引:271
作者
Huang, SH [1 ]
Wen, ZY [1 ]
Zhu, XJ [1 ]
Gu, ZH [1 ]
机构
[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
基金
中国国家自然科学基金;
关键词
lithium-ion batteries; electrochemical performance; doping; Li4Ti5O12; Ag;
D O I
10.1016/j.elecom.2004.08.013
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Composite of Ag metal and Li4Ti5O12 was simply prepared by solid-state reaction with the addition of AgNO3 to the starting materials, TiO2 and Li2CO3. The electronic conductivity and electrochemical performance of Li4Ti5O12 were effectively improved by the dispersed Ag particles. DTA-TG, XRD, SEM, CV, AC impedance and charge-discharge cycle were used to evaluate the Ag-Li4Ti5O12 composite powders. Phase analysis showed that Ag did not enter the spinel structure. High rate discharge capacity and cycling ability of Li4Ti5O12 were particularly developed by Ag additives between the cut-off voltages of 2.3 and 0.5 V. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:1093 / 1097
页数:5
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