Electrolyte comprising fluoro-ethylene carbonate and propylene carbonate, for alkali metal-ion secondary battery

Abstract From the Canadian patent

The invention disclosed is an alkali metal-ion secondary cell having a carbonaceous anode and an electrolyte, comprising an alkali metal salt dissolved in an organic electrolyte solvent. Intercalation and deintercalation during repeated charge/discharge cycles of the secondary cell using a conventional electrolyte solvent causes continual exposure of bare surfaces of the carbonaceous material to the electrolyte resulting in , continual consumption of electrolyte in the formation of new passivation films on the bared or partially covered surfaces adversely affecting the , performance and capacity of the cell. An improvement on the conventional electrolyte involves the addition of …