电池2017，Vol.47Issue(2)：80-83,4.DOI:10.19535/j.1001-1579.2017.02.005
LiDFOB对LiCoO2锂离子电池循环稳定性的影响
Effect of LiDFOB on cycle stability of LiCoO2 Li-ion battery
摘要
Abstract
The effect of lithium difluoro(oxalato)borate(LiDFOB) as an additive in electrolytes on cycle stability of lithium cobalt oxide (LiCoO2) cathode Li-ion battery was investigated with the methods of linear sweep voltammetry(LSV),SEM,X-ray photoelectron spectroscopy (XPS) and galvanostatic charge-discharge.The oxidation current in LiDFOB-added electrolytes on aluminum foil was gradually decreased from the initial to the fourth scanning during 3.0-7.0 V.The protection film containing LiF and O-B compound was founded on the surface of LiCoO2 electrode.The oxidation of the membrane during cycle process was inhibited by using 3％ LiDFOB electrolyte at ambient and high temperature.Higher capacity retention rate was measured after 500 cycles of the LiCoO2/graphite battery with 80.88％ (1％ LiDFOB-added)and 86.62％ (3％ LiDFOB-added) compared to the baseline electrolyte 74.75％.The cycle stability of the battery was improved within LiDFOB based on such factors:the corrosion of the aluminum current collector was reduced,the side reactions of the electrolyte/electrode interface were inhibited and the membrane was protected.关键词
二氟草酸硼酸锂(LiDFOB)/电解液添加剂/循环稳定性/钴酸锂(LiCoO2)Key words
lithium difluoro (oxalato) borate (LiDFOB)/electrolyte additive/cycle stability/lithium cobalt oxide (LiCoO2)分类
信息技术与安全科学引用本文复制引用
廖红英,杨光,王磊,孟蓉..LiDFOB对LiCoO2锂离子电池循环稳定性的影响[J].电池,2017,47(2):80-83,4.
