SECONDARY LITHIUM BATTERY

A FEASIBILITY STUDY OF A AMBIENT TEMPERATURE RECHARGEABLE LITHIUM BATTERY BASED ON THE LI\A- V2S5 CHEMICAL COUPLE IS PROPOSED. IT IS ENVISIONED THAT THIS BATTERY, WHEN FULLY DEVELOPED, WILL PROVIDE SPECIFIC ENERGIES APPROACHING 300 WHR\KG AND VOLUMETRIC ENERGY DENSITIES EXCEEDING 300 WHR\LITE. IN THE PHASE I PROGRAM, IT IS PROPOSED TO SYNTHESIZE AND CHARACTERIZE AMORPHOUS VANADIUM PENTASULPHIDE (A-V2S5), DETERMINE ITS ELECTONIC CONDUCTIVITY, CONSTRUCT AND TEST WELL SPECIFIED, 0.70 A-HR CAPACITY, PREPROTOTYPE CELLS. THE ELECTROLYTE WILL BE 2ME-THF\LIASF6, THE HIGHES EFFICIENCY LI CYCLING SOLUTION AVAILABLE THE CELL TEST WILL CONSIST OF CAPACITY DETERMINATION CORRESPONDING TO CURRENT DENSITIES OF 0.5,2,4 AND 8 MA\CM2 AS WELL AS LIMITED CELL CYCLING. IT IA INTENDED THAT THE PHASE I PROGRAM WILL ESTABLISH A STRONG FOUNDATION FOR A PHASE II PROGRAM INVOLVING EXTENSIVE BATTERY DEVELOPMENT. THE LATTER WILL INCLUDE PROTOTYPE BATTERY FABRICATION.