LI(CF3SO2)(2)N AS AN ELECTROLYTIC SALT FOR RECHARGEABLE LITHIUM BATTERIES WITH GRAPHITIZED MESOCARBON MICROBEADS ANODES

The suitability of Li(CF3SO2)(2)N, lithium bistrifluoromethylsuIfonyl imide, as an electrolytic salt for a graphitized mesocarbon microbeads (MCMBs) anode is investigated via charge/discharge cycling tests and a.c. impedance spectroscopy. The application of Li(CF3SO2)(2)N resulte d in excellent discharge (corresponding to the de-intercalation of lit hium ion from MCMBs) capacity and stable charge/discharge cycleability of the anode in a 1:1 mixture (by volume) of ethylene carbonate with dimethyl carbonate or diethyl carbonate. According to the a.c. impedan ce analysis, the Li(CF3SO2)(2)N electrolyte systems maintained a stabl e interfacial resistance between the anode and the electrolytes during charging of the anode.