METHOD FOR SURFACE MODIFICATION OF HYDROGEN STORAGE ALLOY BY USING AN ALKALINE SOLUTION INCLUDING REDUCTANT

摘要

A method for surface modification of hydrogen storage alloy through alkali soaking using an alkaline solution including reductant is provided to elute the components except for nickel from the surface of hydrogen storage alloy powder and form catalyst bed on the surface of hydrogen storage alloy, thereby improving discharge capacitance and lifetime. A method for surface modification of hydrogen storage alloy comprises a step(S100) of preparing hydrogen storage alloy powder, a step(S200) of selecting the hydrogen storage alloy powder of specific size, a step(S300) of alkali-soaking the selected hydrogen storage alloy powder by dipping it in an alkaline solution including reductant, and a step(S400) of washing and drying the treated hydrogen storage alloy powder.