摘要
以碳酸锂、氧化钴、超细二氧化锆、超细二氧化钛为原料,采用搅拌混合、高温固相烧结法制备了锂离子电池正极材料Li-Co0.9Zr0.05Ti0.05O2,用X射线衍射、扫描电镜对材料的结构与形貌进行了研究,结果表明LiCo0.9Zr0.05Ti0.05O2与LiCoO2一样具有六方层状结构。在0.2 C倍率下材料的初始放电容量达149 mA.h/g,2 C倍率下初始放电容量达141.5 mA.h/g,1 C倍率下初始放电容量达143.6mA.h/g,3.6 V放电平台比例达90%,500次循环后容量衰减8%,材料大电流放电性能好、循环寿命长。
With Li2 CO3, Co3O4, ultrofine ZrO2, uhrofine TiO2 as precursor, the cathode material for lithium ion battery, LiCo0.9Zr0.05Ti0.05O2, was prepared by agitation blending and high-temperature solid sintering. The morphology and structure of this material were characterized by SEM and XRD. The results showed that LiCo0.9Zr0.05Ti0.05O2 had a layered hexagonal structure as LiCoO2 did. The initial discharge capacity of the material was 149 mA · h/g at 0.2 C rate, 141.5 mA·h/g at 2 C, and 143.6 mA·h/g at 1 C. The ratio of its discharge plateau reached to 90% at 3.6 V. The discharge capacity reduced by 8% after 500 cycles. The material shows better high-discharge performance and longer service life.
出处
《矿冶工程》
CAS
CSCD
北大核心
2008年第5期83-85,共3页
Mining and Metallurgical Engineering
基金
国家自科基金(50774016)
湖南省科技攻关项目(05GK3015、05JT1079)
