A RECHARGEABLE LI LIXCOO2 CELL INCORPORATING A LICF3SO3-NMP ELECTROLYTE/

Preliminary cell performance of a rechargeable Li/LixCoO2 cell at room temperature and 80-degrees-C with a LiCF3SO3-NMP electrolyte has been evaluated. The results indicate that the cells using N-methyl-2-pyrro lidinone (NMP) solution at room temperature can deliver energy densiti es of 100-110 W b/kg at 1 mA/CM2 discharge rate over 100 cycles while the cells at 80-degrees-C or those using propylene carbonate (PC) solu tion can only last 40 cycles. Cathode preparation is discussed in term s of reaction time, number of firings, particle size, and type of bind er. This is the first report to be published on the use of a LiCF3SO3- NMP electrolyte in rechargeable lithium cells.