A piperidinium-based ionic liquid electrolyte to enhance the electrochemical properties of LiFePO4 battery

被引：0
作者：
Tao Dong
Liang Zhang
Shimou Chen
Xingmei Lu
Suojiang Zhang
机构：
[1] Chinese Academy of Sciences,Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Key Laboratory of Green Process and Engineering, Institute of Process Engineering
来源：
Ionics | 2015年 / 21卷
关键词：
Ionic liquid; Electrolyte; Lithium-ion battery; High rate and cyclic performance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A piperidinium-based ionic liquid, N-methylpiperidinium-N-acetate bis(trifluoromethylsulfonyl)imide ([MMEPip][TFSI]), was synthesized and used as an additive to the electrolyte of LiFePO4 battery. The electrochemical performance of the electrolytes based on different contents of [MMEPip][TFSI] has been investigated. It was found that the [MMEPip][TFSI] significantly improved the high-rate performance and cyclability of the LiFePO4 cells. In the optimized electrolyte with 3 wt% [MMEPip][TFSI], 70 % capacity can be retained with an increase in rate to 3.5 C, which was 8 % higher than that of electrolyte without [MMEPip][TFSI]. For the Li/LiFePO4 half-cells, after 100 cycles at 0.1 C, the discharge capacity retention was 78 % in the electrolyte without ionic liquid. However, in the electrolyte with 3 wt% [MMEPip][TFSI], it displayed a high capacity retention of 91 %. The good electrochemical performances indicated that the [MMEPip][TFSI] additive would positively enhance the electrochemical performance of LiFePO4 battery.
引用
收藏
页码：2109 / 2117
页数：8
相关论文
共 166 条
  • [1] Wongittharoma N(2014)Charge-storage performance of Li/LiFePO J Power Sources 260 268-275
  • [2] Wang CH(2011) cells with additive incorporated ionic liquid electrolytes at various temperatures Electrochim Acta 56 8576-8581
  • [3] Wang YC(2007)A hierarchical porous carbon material for high power, lithium ion batteries J Power Sources 174 373-379
  • [4] Fey GTK(2003)Low-temperature study of lithium-ion cells using a LiSn micro-reference electrode J Power Sources 119–121 943-947
  • [5] Li HY(2005)A comparative study on the effect of electrolyte/additives on the performance of ICP383562 Li-ion polymer (soft-pack) cells J Electrochem Soc 152 A2046-A2050
  • [6] Wu TY(1999)Suppression of an alkyl dicarbonate formation in Li-ion cells batteries, fuel cells, and energy conversion J Power Sources 81–82 20-26
  • [7] Lee TC(1999)Fluoroethylene carbonate electrolyte and its use in lithium ion batteries with graphite anodes Electrochem Commun 1 148-150
  • [8] Chang JK(2006)Propylene sulfite as film-forming electrolyte additive in lithium ion batteries J Power Sources 158 578-582
  • [9] Yang J(2003)2-Cyanofuran—a novel vinylene electrolyte additive for PC-based electrolytes in lithium-ion batteries Electrochem Commun 5 594-598
  • [10] Zhou XY(2001)N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13-TFSI)—novel electrolyte base for Li battery Green Chem 3 156-164
12345678910