Mengqing Xu, A. Xiao, Weishan Li
2010
Citations
0
Influential Citations
48
Citations
Journal
Journal of The Electrochemical Society
Abstract
The thermal stability of lithium tetrafluorooxalatophosphate [LiPF 4 (C 2 O 4 )] electrolyte was investigated. Although the thermal stabilities of the solid LiPF 4 (C 2 O 4 ) and LiPF 6 were comparable, the thermal stability of the liquid LiPF 4 (C 2 O 4 )/carbonate electrolyte was better than LiPF 6 /carbonate electrolytes. Lithium-ion cells containing LiPF 4 (C 2 O 4 ) electrolyte had better capacity retention than LiPF 6 electrolyte containing cells upon cycling after storage at 65°C for 2 weeks. Ex situ analysis of the electrodes before and after storage at 65°C and cycling suggested that differences in the structures of the anode and cathode surface films contributed to the superior performance of cells containing LiPF 4 (C 2 0 4 ) electrolyte.