Mixed Electrolytes of Organic Solvents and Ionic Liquid for Rechargeable Lithium-Ion Batteries

作者：Choi Ji Ae; Shim Eun Gi; Scrosati Bruno; Kim Dong Won^*

来源：BULLETIN OF THE KOREAN CHEMICAL SOCIETY, 2010, 31(11): 3190-3194.

DOI：10.5012/bkcs.2010.31.11.3190

• Cycling performance
• Ionic liquid
• Lithium-ion battery
• Mixed electrolyte
• Thermal stability

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 LiCoO(2) 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 Li(1 x)CoO(2) in the electrolyte solution

• 出版日期2010-11-20