离子液体复合电解质与三元正极的相容性  

Compatibility of ternary cathode with ionic liquid-based composite electrolyte

作　　者：王振峰[1] 张小雪[1] 李翠华[1] 刘剑洪[1] 张黔玲[1] 

机构地区：[1]深圳大学化学与化工学院,深圳市功能高分子重点实验室,深圳518060

出　　处：《深圳大学学报（理工版）》2015年第3期251-256,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家重点基础研究发展计划资助项目(613142020201);深圳市科学技术研究与发展基金资助项目(JCYJ20140418193546111)~~

摘　　要：室温下合成离子液体N-甲基-N-丙基哌啶双(三氟甲烷磺酰)亚胺(N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide,PP13TFSI)和N-甲基-N-丙基吡咯烷双(三氟甲烷磺酰)亚胺(N-methylN-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide,PYR13TFSI),并与有机溶剂和双(三氟甲烷磺酰)亚胺锂(lithium bis(trifluoromethanesulphoyl)imide,Li TFSI)混合制备成复合电解质,研究该电解质的热稳定性和不燃性能.发现将其与锂离子电池三元正极材料镍钴锰酸锂Li Co1/3Mn1/3Ni1/3O2和锂片组装成CR-2032纽扣电池(Li Co1/3Mn1/3Ni1/3O2/电解质/锂),在0.1 C倍率下首次放电比容量为154.5 m A·h/g、库伦效率达到85.5%.该复合电解质具有宽的电化学窗口、高的热稳定性、不燃性和良好的充放电循环性能.N-methyl-N-propylpiperidinium bis（ trifluoromethanesulfonyl） imide（ PP13TFSI） and N-methyl-Npropylpyrrolidinium bis（ trifluoromethanesulfonyl） imide（ PYR13TFSI） were synthesized at room temperature and mixed with organic solvents and lithium bis（ trifluoromethanesulphonyl） imide（ Li TFSI） to prepare the composite electrolyte. The thermal stability and non-flammability of the composite electrolyte were investigated. The electrolyte,Li Co1 /3Mn1 /3Ni1 /3O2 cathode and lithium metal anode were encapsulated into CR-2032 coin cell（ Li Co1 /3Mn1 /3Ni1 /3O2/ electrolyte / Li）. The initial discharge capacity of the coin cell reaches 154. 5 m A·h / g at the rate of 0. 1 C,and the coulombic efficiency is 85. 5%. The results show that the composite electrolytes possess characteristics including a wide electrochemical stability window,high thermal stability,non-flammability,and better cycle performance.

关 键 词：应用电化学 锂离子电池 电解质 离子液体 相容性 不燃性 

分 类 号：O69[理学—化学]