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

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.