HYDROGEN ABSORBING ALLOY, NEGATIVE ELECTRODE COMPRISING SAME AND NICKEL-METAL HYDRIDE SECONDARY BATTERY COMPRISING SAME

A nickel-metal hydride secondary battery (2) comprises an outer can (10) and a group of electrodes (22) housed in the outer can (10) together with an alkaline electrolytic solution. The group of electrodes (22) comprises a positive electrode (24) and a negative electrode (26) that are superposed with a separator (28) interposed therebetween, and the negative electrode (26) comprises a hydrogen absorbing alloy for nickel-metal hydride secondary batteries, the hydrogen absorbing alloy having a single composition and composed of a plurality of crystal phases.