Abstract: Vanadium bronze rich in lithium(Li₆V₅O₁₅)was prepared from Li₂CO₃ and V₂O₅ at 680℃. The charge-discharge behaviour of the bronze electrode was investigated in LiAsF₆-PC electrolyte at various current densities.Li/bronze cell showed a high specific capacity, and more than 340Ah/kg was obtained at 0.2mA/cm² and 1.0V cut-off voltage. The X-ray diffraction results showed that the structure of the new bronze was stable for lithium insertion.AC impedance data of Li/bronze cell showed that the cathodic process was mainly controlled by diffusion of Li in the bronze.

Key words: vanadium bronze, secondary lithium battery, lithium insertion reaction, AC impedance