摘要
研究二草酸硼酸锂(LiBOB)作为成膜添加剂对钛酸锂(Li4Ti5O12)/LiNi1/4Co1/2Mn1/4O2电池高温性能的影响。通过循环伏安扫描、X射线光电子能谱分析,考察LiBOB在Li4Ti5O12负极上的成膜情况,用电化学交流阻抗谱考察膜的热稳定性。添加剂LiBOB在钛酸锂负极的还原电位为1.75 V(vs.Li/Li+),优先于电解液在负极表面发生电化学反应形成固体电解质相界面(SEI)膜。该膜可降低电池的电荷转移阻抗,有利于提高电池的高温循环和高温储存性能。
Effect of lithium bis （ oxalate ） borate （ LiBOB ）, as a film-forming additive, on the high-temperature of lithium titanate （Li4Ti5O12 ）/LiNil/4 Co1/2 Mnl/4O2 battery was studied. Cyclic voltammetry and X-ray photoelectron spectroscopy analyses were used to study the film-forming effect of LiBOB at Li4Ti5O12 cathode. Electrochemical impedance spectroscopy was used to analyze the thermal stability of the film. The reduction potential of LiBOB at Li4Ti5 O12 cathode was 1.75 V （vs. Li/Li ＋ ）, much higher than that of the solid electrolyte interface （ SEI ） film electrochemically formed by electrolyte solvents at the cathode. As charge transfer resistance could be reduced by the film, it was helpful to improve high-temperature cycle and storage performance of battery.
出处
《电池》
CAS
CSCD
北大核心
2014年第2期80-83,共4页
Battery Bimonthly
