HYDROGEN STORAGE ALLOY AND HYDROGEN STORAGE ALLOY ELECTRODE USING IT

摘要

PROBLEM TO BE SOLVED: To provide an alloy electrode having the long service life by attaining an improvement in corrosion resistance of hydrogen storage alloy and restraint of pulverization. SOLUTION: Hydrogen storage alloy has a CaCu5 type crystal structure, and is characterized in that a half value width of the (111) surface peak in X-ray diffraction of powder is 0.20 to 0.50 degree. It is flake shaped or ribbon- shaped hydrogen storage alloy which is manufactured by a liquid quenching method and has a CaCu5 type crystal structure, and the hydrogen storage alloy is characterized in that a crystal whose C axis is oriented in the direction vertical to the thickness direction of the alloy exists by 60% or more when X-ray diffraction is performed on the alloy.