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电化学  2012 

锂离子电池MnO/TiN负极研究

, PP. 37-42

Keywords: 溶胶-凝胶法,锂离子电池,负极,导电网络

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Abstract:

以乙酸锰和钛酸四丁酯为原料,柠檬酸为络合剂,采用溶胶-凝胶法制备钛酸锰(MnTiO3)粉体,而后将其粉体高温氨气氮化,可得到MnO/TiN复合材料.使用X射线衍射(XRD)、X射线能量色散谱(EDS)和场发射扫描电子显微镜(FESEM)表征材料的物相结构与组分、观察其形貌.采用循环伏安、恒流充放电和电化学阻抗方法测试电极电化学性能.结果表明,MnO/TiN电极在100mA?g-1和1A?g-1倍率放电下,比容量分别为394mAh?g-1和146mAh?g-1,均高于单纯MnO电极比容量和倍率性能,这归因于复合材料中的TiN提供了导电网络,并有效地抑制了电极在充放电过程中的体积膨胀效应.

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