表面包覆对富锂锰基材料循环稳定性影响研究  

Impacts of Surface Coating on Cycle Stability of Li-rich Manganese-based Material

作　　者：殷春梅[1] 郭忻[1] 周春仙[1] 夏朝阳[1] 廖达前[1] 习小明[1] 肖可颂[1] 陈晓青[1] 

机构地区：[1]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《矿冶工程》2016年第3期94-97,共4页Mining and Metallurgical Engineering

基　　金：转制科研院所创新能力专项经费(2014EG113173);国家自然科学基金(51474037)

摘　　要：采用TiO_2和Al_2O_3对富锂锰基材料Li[Li_(0.2)Ni_(0.13)Co_(0.13)Mn_(0.54)]O_2进行表面包覆改性,研究了表面包覆对富锂锰基材料循环过程中放电容量和电压的影响。结果表明,Al_2O_3包覆富锂锰基材料的放电电压下降较缓慢,而TiO_2包覆富锂锰基材料的放电容量下降较缓慢;表面包覆后富锂锰基材料循环稳定性的变化与材料微观结构形貌相关性较小。The Li-rich manganese-based material LiLi0.2Ni0.13Co0.13Mn0.54]O2 was modified by being coated with TiO2 or Al2O3. The impacts of the coatings on the discharge capacity and voltage drop of the material during cycle process were studied. The results showed that the discharge voltage of the material dropped slowly when coated with Al2O3, while the discharge capacity decreased slowly with the TiO2 coating. The change in cycle stability was little related to the microstructure and morphology of the material.

关 键 词：锂离子电池 正极材料 富锂锰基材料 TIO2 AL2O3 表面包覆 循环稳定性 

分 类 号：TM912[电气工程—电力电子与电力传动]