FORMED BODY OF AMORPHOUS Mg-Ni HYDROGEN STORAGE ALLOY, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an Mg-Ni hydrogen storage alloy increased in the amount of hydrogen occlusion as compared with conventional Mg-Ni hydrogen storage alloys and excellent in cycling characteristic, a formed body of the Mg-Ni hydrogen storage alloy, and a manufacturing method of the formed body. SOLUTION: The amorphous Mg-Ni hydrogen storage alloy has a composition by atomic percentage represented by compositional formula Mg100-a-bNiaPdb (wherein, 25=a+b=40 and 2=b=15 are satisfied) and contains =50% amorphous phase, and further, the capacity after 10 times of electrochemical charge- and -discharge cycles at room temperature is =90% of the initial capacity.