Hydrogen absorbing Ni,Zr-based alloy and rechargeable alkaline battery

摘要

A hydrogen absorbing Ni,Zr-based alloy comprising 5 to 20 % by weight of titanium (Ti), 10 to 37 % by weight of zirconium (Zr), 5 to 30 % by weight of manganese (Mn), 0.01 to 15 % by weight of tungsten (W), 6 to 30 % by weight of iron (Fe), and optionally at least one of 0.1 to 7 % by weight of Cu, 0.05 to 6 % by weight of Cr and 0.01 to 5 % by weight of Al, and balance nickel (Ni) and unavoidable impurities; and a sealed Ni-hydrogen rechargeable battery comprising a negative electrode provided with a hydrogen absorbing alloy as an active material, an Ni positive electrode, a separator and an alkaline electrolytic solution, wherein the hydrogen absorbing alloy is composed of such hydrogen absorbing Ni,Zr-based alloy.