Investigation of Charge Storage Properties in V_2O_5 Thin Films

Lithium was inserted electrochemically from an electrolyte into V2O5 thin films prepared by evaporation and posttreated at different temperatures in air so that LixV2O5 was obtained. Li+storage properties, reversibiliy of Li+ intercalation/deintercalation in V2O5 thin films and influence of Li+ insertion on their optical properties were investigated. The experimental results show that two factors, the V5+ concentration and the sum total of sites in V2O5 thin films, control the capacity of Li+ insertion into V2O5 thin films, and that these thin films have a good Li+ storage characteristic, stability and reversibility.