LiNi_(1/3)Co_(1/3)Mn_(1/3)O^(2)材料不同温度下电化学性能研究  

Study on electrochemical properties of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)materials at different temperatures

作　　者：王娟 杨胜杰 阿丽莉 江博 WANG Juan;YANG Sheng-jie;A Li-li;JIANG Bo(Nuclear Geology Bureau of Henan Province,Zhengzhou 450000,China)

机构地区：[1]河南省核工业地质局,河南郑州450000

出　　处：《化学工程师》2023年第5期104-106,共3页Chemical Engineer

基　　金：河南省财政地质勘查项目(豫自然资发[2019]22号;豫自然资发[2021]17号)。

摘　　要：利用溶胶-凝胶高温法制得三元正极材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2),在不同的温度条件下,系统的研究了材料的电化学性能。研究发现,该材料在环境温度为25、45、75℃条件下,首次放电容量分别为139.5、129.7、97.8mAh·g^(-1),第20周放电容量分别为133.2、120.9、87.8mAh·g^(-1),20周循环容量保持率分别为95.5%、93.2%、89.8%。表明该材料具有优越的循环性能和高温稳定性能。The three-electrode cathode material LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)was prepared by sol-gel high-temperature method.The electrochemical properties of the material were studied systematically under different temperature conditions.The results show that the first discharge capacity of the material is 139.5,129.7 and 97.8mAh·g^(-1)respectively at ambient temperature of 25,45 and 75℃,and the discharge capacity in the 20th week is 133.2,120.9 and 87.8mAh·g^(-1)respectively.The retention rates of cycle capacity in the 20th week are 95.5%,93.2%and 89.8%respectively.The results show that the material has excellent cycle performance and high temperature stability.

关 键 词：溶胶-凝胶高温法 锂离子正极材料 三元材料 

分 类 号：TQ427.2[化学工程]