THE SURFACE MODIFICATION OF MG-BASED ALLOY OF HIGH DISCHARGE CAPACITY FOR IMPROVEMENT IN CYCLE LIFE

摘要

PURPOSE: A method for producing cathode material for rechargeable nickel/hydrogen storage alloy battery is provided for improving cycle life of the magnesium-based alloy by a sintering and mechanical grinding method. CONSTITUTION: The method for producing cathode material for rechargeable nickel/hydrogen storage alloy (Ni/MH) battery comprises mechanically grinding surface of MgNi alloy to improve its property; mixing Ni or Cu powders to the improved alloy to cool and compress; and producing the final material by a sintering process to result in the improvement of cycle life of high capacity magnesium-based alloy electrode. The cathode material has frequently higher hydrogen storage capacity of about 510mAh/g simultaneously with the improvement of cycle life at recharging/discharging the battery.