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电化学  2013 

纯相Li4Ti5O12水热合成及其电化学性能

, PP. 135-140

Keywords: 高功率,水热法,Li4Ti5O12,负极材料,锂离子电池

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Abstract:

以纳米级锐钛矿型二氧化钛(TiO2)和氢氧化锂(LiOH)为原料,利用水热法合成了尖晶石型Li4Ti5O12材料,并研究了LiOH浓度、水热反应时间及热处理温度对Li4Ti5O12样品结构和电化学性能的影响,分析了Li4Ti5O12的形成过程.采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)分析样品材料结构,观察材料形貌.结果表明,LiOH浓度0.2mol.L-1、水热反应时间12h及煅烧温度700oC可得到纯相尖晶石型Li4Ti5O12,该样品1C倍率放电比容量为146.3mAh.g-1,40C高倍率其放电比容量仍有101.3mAh.g-1.

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