An alkaline storage battery which is excellent in charge and discharge
cycle life characteristics and high-rate discharge characteristics is
provided by constructing it using an electrode made of an MmNi type
hydrogen-absorbing alloy powders having modified surface. The alkaline
storage battery comprises a negative electrode made using a
hydrogen-absorbing alloy in the form of powders comprising at least one
rare earth element, nickel and at least one transition metal in which the
surface portion of the alloy has nickel in metallic state exposed at the
surface, pores positioned between the nickel and the nickel, and a
nickel-rich layer present on the alloy surface contacting with the pores,
a positive electrode made using a metal oxide, a separator, and an
alkaline electrolyte.
