ELECTROLYTES AND METAL HYDRIDE BATTERIES

摘要

Metal hydride batteries comprising an electrolyte composition which comprises an aqueous solution comprising potassium hydroxide (KOH) and one or more halide and/or oxyacid salts exhibit reduced degradation of the anode material during operation. The salts are for instance alkali metal salts. Anode materials exhibit for instance < 100% of the degradation of the same anode material in the same battery when replacing the electrolyte composition with 30 weight percent (wt%) aqueous KOH and the conductivity of the electrolyte composition is for instance > 85% of 30 wt% aqueous KOH. Anode materials are for example ABx high capacity hydrogen storage alloys comprising Mg where x is from about 0.5 to about 5 and which has a discharge capacity of > 400 mAh/g.