Binary Mixed Solvent Electrolytes Containing Trifluoropropylene Carbonate for Lithium Secondary Batteries
作者： Juichi Arai , Hideaki Katayama , Haruo Akahoshi
DOI: 10.1149/1.1433749
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摘要: To improve the safety of electrolyte used for lithium secondary batteries, binary mixed solvent electrolytes containing trifluoropropylene carbonate (TFPC) as cosolvent have been studied. Chloroethylene (CIEC), ethylene carbonate, and propylene were chosen other component electrolytes. The solution properties these characterized using conductivity nuclear magnetic resonance (NMR) spectroscopy. chemical shift CIEC TFPC did not vary with mixing ratio due to their similar enthalpies solvation derived by molecular orbital simulation. ClEC/TFPC showed higher discharge capacities lower irreversible capacity loss in both a graphite/Li cell Li 1+x Mn 2 O 4 /Li than systems. Electrochemical impedance spectroscopy measurements made cells composed each electrolyte. surface graphite anode was analyzed X-ray photoelectron spectroscopy, infrared solid 7 Li-NMR
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