物理化学学报 >> 2007, Vol. 23 >> Issue (Supp): 1-4.doi: 10.3866/PKU.WHXB2007Supp01

研究论文    下一篇

高温下锂离子电池电解液的性能

郭营军; 李其其格; 宁英坤; 其鲁; 唐宏武   

  1. 中信国安盟固利新能源科技有限公司, 北京 102200; 北京大学化学与分子工程学院应用化学系, 新能源材料与技术实验室, 北京 100871
  • 收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2008-01-04
  • 通讯作者: 其鲁 E-mail:qilu@pku.edu.cn

Performance of Liquid Electrolyte for Lithium-ion Battery at Elevated-temperature

GUO Ying-Jun; LI Qi-Qi-Ge; NING Ying-Kun; QI Lu; TANG Hong-Wu   

  1. CITIC Guoan Mengguli New Engery Technology Co. Ltd., Beijing 102200, P. R. China; New Energy Materials and Technology Laboratory, Department of Applied Chemistry, College of Chemical and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:1900-01-01 Revised:1900-01-01 Published:2008-01-04
  • Contact: QI Lu E-mail:qilu@pku.edu.cn

摘要: 开发一种能够改善尖晶石锰酸锂电池高温循环性能的功能型电解液. 把添加剂Li2CO3加入常规LiPF6电解液中就形成了高温电解液. 添加剂Li2CO3的加入, 能够明显地抑制高温时电解液中氢氟酸的产生. 使用6 Ah尖晶石锰酸锂铝塑膜电池, 测试了含有添加剂Li2CO3的电解液的高温(55 ℃)循环性能, 并与常规电解液进行了对比. 测试结果表明, 含有该添加剂的高温电解液, 能够明显地改善尖晶石锰酸锂电池的高温循环性能.

关键词: 锂离子电池; 尖晶石锰酸锂; Li2CO3; 高温电解液; 高温循环

Abstract: A new functional electrolyte was developed to improve the cycling performance of LiMn2O4 spinel at elevated temperatures. The so-called high-temperature electrolyte was formed by adding additive Li2CO3 into conventional LiPF6 electrolyte solutions. The Li2CO3 could greatly surpress the production of hydro fluoric acid in electrolyte solution even at elevated temperatures. With the increase of Li2CO3 ratio in electrolyte solution, the HF contents decreased. Electrochemical measurements of 6 Ah lithium-ion batteries with spinel LiMn2O4 as cathode material showed that additive Li2CO3 could greatly improve the elevated temperature (55 ℃) cycling performance of spinel LiMn2O4 lithium-ion batteries.

Key words: Lithium-ion battery, Lithiummanganese oxide spinel, Li2CO3, Electrolyte for elevated temperature, Elevated-temperature cycling

MSC2000: 

  • O646