Silver and copper doped vanadium oxides as lithium intercalation hosts

摘要

Silver and copper doped vanadium pentoxides were synthesized through a simple process from a V_2O_5 hydrogel precursor. The materials showed very high electrochemical performance with specific capacities ranging from 300 mAh/g to 450 mAh/g corresponing to 2.2 to 4 Li~+ ions per mole of V_2O_5. The composite cathodes containing the doped materials showed high intercalation rate performance. In addition, copper-doped V_2O_5 cathodes showed an excellent reversibility on cycling with no capacity fading after more than 450 cycles.