Effect of temperature on electrochemical performance of ionic liquid based polymer electrolyte with Li/LiFePO4 electrodes

被引：46

作者：

Gupta, Himani ^{[1
]}

Shalu ^{[1
]}

Balo, Liton ^{[1
]}

Singh, Varun Kumar ^{[1
]}

Singh, Shishir Kumar ^{[1
]}

Tripathi, Alok Kumar ^{[1
]}

Verma, Yogendra Lal ^{[1
]}

Singh, Rajendra Kumar ^{[1
]}

机构：

[1] Banaras Hindu Univ, Inst Sci, Dept Phys, Ionic Liquid & Solid State Ion Lab, Varanasi 221005, India

来源：

SOLID STATE IONICS | 2017年 / 309卷

关键词：

Polymer electrolyte; Ionic liquid; Linear sweep voltanunetry; Charge discharge; ROOM-TEMPERATURE; POLY(ETHYLENE OXIDE); CATHODE MATERIALS; MOLTEN-SALTS; LITHIUM BATTERIES; CONDUCTIVITY; CHALLENGES; STABILITY; BIS(TRIFLUOROMETHYLSULFONYL)IMIDE; BEHAVIOR;

D O I：

10.1016/j.ssi.2017.07.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly ethylene oxide based polymer electrolytes containing salt lithium bis(trifluoromethylsulfonyl)imide and ionic liquid 1-butyl-3-methyl pyridinium bis(trifluoromethylsulfonypimide are synthesized. The prepared polymer electrolytes are found to be thermally stable up to 340-360 degrees C. Ionic conductivity is observed 2.5 x 10(-5) S cm(-1) at 25 degrees C and 2.3 x 10(-4) S cm(-1) at 40 degrees C for 30% IL containing polymer electrolyte. Also, ionic transference number > 0.99 and cationic transference number similar to 0.41 with electrochemical window similar to 5.2 V at 25 degrees C is observed for the electrolyte containing 30% IL. The highest Li+ ion conducting polymer electrolyte is further optimised for battery application. The specific discharge capacity of the prepared cell (Li/polymer electrolyte/LiFePO4) is found to be 106 mAh g(-1) at 25 degrees C and 160 mAh g(-1) at 40 degrees C up to 25 cycles with 0.1 C current rate. The increment in discharge capacity at higher temperature may be due to the better electrode-electrolyte contact. Decrement in cell resistance is also observed at higher temperature.

引用

页码：192 / 199

页数：8

共 60 条

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