PROPERTIES OF SILVER-DEPOSITED GRAPHITE ANODES FOR LITHIUM SECONDARY BATTERIES

Silver-deposited graphite anodes have been developed using a wet chemi cal reduction method for depositing silver particles with the diameter about 100 nm onto graphite particles. There were the increase of disc harge capacities for silver-deposited graphite anodes with the silver content smaller than 10 wt%, comparing to that for the graphite anode. The maximum capacity was obtained at the silver content of 5 wt %. Th is increase of discharge capacity may originate from the observed decr ease of electrical resistance in electrode materials. Ag deposition im proved high rate discharge performance and cyclability. There was only the capacity loss of 12 % for Ag deposited anodes after 1500 charge a nd discharge operations. Long cyclability of Ag deposited anodes is pr esumed to be associated with a stable SEI (Solid Electrolyte Interface ) during charge and discharge cycles.