Ag包覆对正极材料LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)性能的影响  

Effect of Ag coating on properties of cathode material LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)

作　　者：王树新 郑舒 WANG Shuxin;ZHENG Shu(Luoyang Zhi Fang Environmental Technology Co.,Ltd.,Luoyang Henan 471000,China;College of Materials Science and Engineering,Henan Institute of Technology,Xinxiang Henan 453003,China)

机构地区：[1]洛阳智方环保技术有限公司,河南洛阳471000 [2]河南工学院材料科学与工程学院,河南新乡453003

出　　处：《电源技术》2025年第3期543-548,共6页Chinese Journal of Power Sources

基　　金：河南省高等学校重点科研项目(24B480003)。

摘　　要：为了提高LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)的稳定性和倍率性能,采用湿法和高温煅烧法对其表面进行Ag包覆改性。利用X射线衍射、扫描电子显微镜和电化学充放电等测试,对材料结构进行表征和电化学性能测试,结果表明:单质Ag可以均匀包覆LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)材料表面,且不影响材料的晶体结构,Ag包覆可提高材料在工作过程中的循环稳定性和倍率性能。实验所得材料常温1 C倍率下的放电比容量高达173.7 mAh/g,25℃下1 C循环2000次后容量保持率在89%以上。In order to improve the comprehensive electrochemical properties of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) for lithium ion battery,the cathode material was coated with Ag by wet and high temperature calcination.The materials were characterized by X-ray diffraction,scanning electron microscope and electrochemical test methods.The results show that elemental Ag coating could be uniformly distributed on the surface of the material without changing the crystal structure of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) material,and could improve the cyclic stability and high current charge-discharge performance of the material.The discharge specific capacity of the material coated with Ag is as high as 173.7 mAh/g at room temperature and 1 C,after 2000 cycles,the capacity retention of the coated-Ag LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) is above 89%.

关 键 词：电化学性能 LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料 煅烧法 

分 类 号：TM912[电气工程—电力电子与电力传动]