摘要
采用不同的锂盐体系(LiBF4、LiPF6、LiODFB)及添加剂(T、FEC)对镍锰酸锂锂电池进行电性能测试。考察了镍锰酸锂作为正极材料在不同的锂盐电解液体系及添加剂下电池的循环性能、循环伏安曲线、阻抗的研究。结果表明:噻吩作为添加剂时,少量添加对电池的循环性能的改变越好;FEC的添加不影响电池容量,可以较好的保持电池的循环容量率;LiODFB的加入可以使电池的循环伏安曲线都具有单一的氧化还原峰,并使电池具有较好的循环性能。
Different lithium salts(LiBF4,LiPF6,LiODFB)and additives(T,FEC)were used to test the electrical properties of LiNi0.5Mn1.5O4 battery.The cycle performance,cyclic voltammetry curves and impedance of LiNi0.5Mn1.5O4 as cathode material under different lithium salt electrolyte systems and additives were investigated.The results show that when the thiophene was used as an additive,the smaller the content was,the better the cycle performance of the battery was;the addition of FEC did not affect the coulombic efficiency and battery capacity;The addition of LiODFB can make the cyclic voltammetry curve of the battery have a single redox peak and make the battery have better cycle performance.
作者
张净净
张丽娟
李海朝
ZHANG Jing-jing;ZHANG Li-juan;LI Hai-chao(College of Chemistry and Chemical Engineering,Qinghai Nationalities University,Xining 810007,China)
出处
《化学研究与应用》
CAS
CSCD
北大核心
2020年第4期510-516,共7页
Chemical Research and Application
关键词
镍锰酸锂
添加剂
循环性能
循环伏安曲线
阻抗
LiNi0.5Mn1.5O4
additive
circulating performance
cyclic voltammetry curve
impedance
