锂离子电池负极材料Li4Ti4.9Ni0.1O12的制备及其电化学性能

Qing-feng SHI,Xian-ming WU,Xin-xiong DING,Ping LIU, Ya-li WU,Xiao-lin YU

Fine Chemicals（2019）

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Abstract

以Li2CO3、TiO2、Ni(CH3COO)2?4H2O为原料,采用固相法制备尖晶石型Li4Ti4.9Ni0.1O12锂离子负极材料.通过X射线衍射(XRD)、扫描电镜(SEM)、恒流充放电测试以及交流阻抗等技术对材料进行了结构、形貌表征及电化学性能测试.结果表明,制备的Li4Ti4.9Ni0.1O12材料无杂相,颗粒大小均匀,在0.5 C下首次放电比容量为173.3 mA?h/g,库伦效率为97.4％,50次循环后,材料的放电比容量为163.4 mA?h/g,容量保持率为94.3％.

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