摘要
以乙酸盐为原料,通过一步微波法烧结制备出了镍钴锰酸锂LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)正极材料,研究了烧结温度、保温时间对材料结构形貌以及电化学性能的影响。结果表明,在900℃保温4 h所制备的正极材料,以0.2C倍率,2.75~4.3 V电压平台下首次放电容量为156 mAh/g,经过50圈充放电循环后,容量为136.91 mAh/g,容量保持率为87.76%;在电流密度0.5C和1C条件下,经过50次循环后容量保持率分别为86.59%、79.71%。
LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2) cathode materials were prepared by one-step microwave sintering with acetate as raw material.The effects of sintering temperature and holding time on the structure,morphology and electrochemical properties of the materials were studied.The results show that the first discharge capacity of the cathode material prepared at 900℃for 4 h is 156 mAh/g at the voltage platform of 2.75—4.3 V at the rate of 0.2C.After 50 cycles of charge and discharge,the capacity is 136.91 mAh/g and the capacity retention rate is 87.76%.Under the current density of 0.5C and 1C,the capacity retention rate is 86.59%and 79.71%respectively after 50 cycles.
作者
董恩华
纪鸿文
刘秉国
宇文超
DONG Enhua;JI Hongwen;LIU Bingguo;YU Wenchao(School of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Unconventional Metallurgy,Ministry of Education,Kunming University of Science and Technology,Kunming 650093,China)
出处
《有色金属工程》
CAS
北大核心
2022年第6期14-22,共9页
Nonferrous Metals Engineering
基金
国家重点研发计划(2018YFC1900500)。
