Preparation and electrochemical performance of Ag doped Li4Ti5O12
Preparation and electrochemical performance of Ag doped Li4Ti5O12
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DOI：
10.1016/j.elecom.2004.08.013
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发表时间：
2004-11-01
影响因子：
5.4
通讯作者：
Gu, ZH
中科院分区：
文献类型：
--
作者：
Huang, SH;Wen, ZY;Gu, ZH
以TiO 2和Li 2CO 3为原料，添加AgNO 3，通过固相反应制备了金属银和Li 4 Ti 5 O 12的复合材料。Ag颗粒的分散有效地提高了Li 4 Ti 5 O 12的电子导电性和电化学性能。采用DTA-TG、XRD、SEM、CV、交流阻抗和充放电循环等测试手段对Ag-Li 4 Ti 5 O 12复合粉体进行了表征。相分析表明，银没有进入尖晶石结构。Li 4 Ti 5 O 12的高倍率放电容量和循环能力特别是通过Ag添加剂在2.3和0.5 V的截止电压之间开发的。（C）2004 Elsevier B. V.保留所有权利。
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.