电源技术2017，Vol.41Issue(4)：512-516,5.
电解液锂盐浓度对磷酸铁锂电化学性能的影响
Effect of lithium salt concentration in electrolyte on electrochemical properties of lithium iron phosphate cathode
摘要
Abstract
The influence of LiPF6 concentration on the conductivity and flammability of the electrolyte based on PC/EC mixing solvent was investigated.The electrochemical properties of LiFePO4 cathode in the electrolyte of different LiPF6 concentrations were determined.The results show that the conductivity and flammability of the electrolyte are significantly affected by the LiPF6 concentration.The rate performance and cycling performance of LiFePO4 cathode enhance with LiPF6 concentration increasing.An excellent cycling performance at 60 ℃ is achieved when the LiPF6 concentration is higher than 2.0 mol/L.The main reason for the enhancement of high rate performance and cycling stability is due to the decrease of concentration polarization of the electrolyte with high salt concentration.Side reactions at the electrode/electrolyte interface and the corrosion of aluminum foil are also suppressed.关键词
锂离子电池/磷酸铁锂/电解液/浓度Key words
lithium ion batteries/lithium iron phosphate/electrolyte/concentration分类
信息技术与安全科学引用本文复制引用
郑雪莹,丁远雷,贠娇娇,曲群婷..电解液锂盐浓度对磷酸铁锂电化学性能的影响[J].电源技术,2017,41(4):512-516,5.基金项目
国家自然科学基金(21473120) （21473120）
