期刊
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
卷 31, 期 11, 页码 3190-3194出版社
WILEY-V C H VERLAG GMBH
DOI: 10.5012/bkcs.2010.31.11.3190
关键词
Cycling performance; Ionic liquid; Lithium-ion battery; Mixed electrolyte; Thermal stability
资金
- MKE/KEIT [KI002176-2010-02]
Mixed electrolytes formed by the combination of 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide (BMP-TFSI) ionic liquid and standard liquid electrolyte are prepared and characterized Linear sweep voltammetry measurements demonstrate that these mixed systems exhibit a wide electrochemical stability window, allowing them to be suitable electrolyte for carbonaceous anode-based lithium-ion batteries Lithium-ion cells composed of graphite anode and LiCoO2 cathode are assembled using the mixed electrolytes, and their cycling performances are evaluated The cell containing proper content of BMP-TFSI shows good cycling performance comparable to that of a cell assembled with organic electrolyte The presence of BMP-TFSI in the mixed electrolyte contributes to the reduction of the flammability of electrolyte solution and the improvement of the thermal stability of charged Li1 xCoO2 in the electrolyte solution
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