Co_3O_4对钴酸锂结构性能的影响

Affection for structural properties of LiCoO_2 by Co_3O_4

针对Co3O4 原料以国产替代进口后生产的钴酸锂 (LiCoO2 )电化学性能不稳的问题 ,采用SEM、XRD结构分析和实际锂离子电池评价LiCoO2 的性能 ,研究了Co3O4 原料的化学和物理性能及微观形貌对合成LiCoO2 产品的微观形貌、电化学性能的影响。通过改变烧制工艺 ,使LiCoO2 的容量从12 8提高到 138mAh/g以上 ,10 0次循环容量下降 15 %以下 ,平台下降从 2 5 %降到 16 % 。

According to the technique problems on unstable electrochemical properties of LiCoO_2 produced by domestic materials substituted for imports,this article describes the effects of raw material Co_3O_4 with different micro-scope structure and properties for the final micro-scope structure,electrochemical characteristics of LiCoO_2 by SEM,XRD analysis and Li-ion cell approval method.By changing sintering technology,the electrochemical capacity of Li-ion cell of LiCoO_2 were from 128 to 138mAh/g;after cycle discharging 100times,the attenuation of capacity were less than 15%,the attenuation of voltage platform were less than 16%.The electrochemical properties of products by inland Co_3O_4 were the same as with importing one.