Ce包覆锂离子高镍正极材料的合成及改性研究
Study on Synthesis and Modification of Ce Coated Lithium Ion High Nickel Cathode Materials
黄金 1余烨 1向黔新 1李路1
作者信息
- 1. 贵州振华新材料有限公司,贵州 贵阳 550015
- 折叠
摘要
将单水氢氧化锂和前驱体(化学式为:Ni0.8Co0.1Mn0.1(OH)2)通过固相混合和高温烧结的工艺制备正极材料LiNi0.8Co0.1Mn0.1O2,再通过液相法在材料表面包覆不同含量的Ce包覆层.用XRD,SEM,扣式电池对样品进行测试表征,分析Ce包覆量对材料结构,形貌,电化学性能的影响.实验结果表明:合成的高镍正极材料具有R-3m空间结构六方晶系a-NaFe02 型结构,包覆量为0.5%时,容量达到最大216.55mAh/g,50次循环后保持率达到87.44%,综合性能最佳.
Abstract
The cathode material LiNi0.8Co0.1Mn0.1O2 is prepared by solid phase mixing and high-temperature sintering of Lithium oxide monohydrate and precursor(chemical formula:Ni0.8Co0.1Mn0.1(OH)2),and then the material surface is coated with Ce coating layers of different contents by liquid phase method.XRD,SEM,and Coin cell were used to test and characterize the effect of Ce coating amount on the material structure,morphology,and electrochemical performance.The experimental results show that the synthesized high nickel cathode material has a R-3m spatial structure with a-NaFe02 type structure.When the coating amount is 0.05%,the maximum capacity reaches 216.55 mAh/g,and the retention rate reaches 87.44%after 50 cycles.The comprehensive performance is the best.
关键词
锂电池/正极材料/高镍/包覆/改性Key words
lithium battery/cathode material/high nickel/coated/modification引用本文复制引用
出版年
2024
NETL
NSTL
万方数据