Patent ID: 6740449
Filing Date: 2004-05-25
Classification: H01M,Y02E

Abstract:
A nickel electrode for an alkaline storage battery, comprising:a conductive porous member; and an active material with which the conductive porous member is filled, the active material including (a) a main active material layer substantially made of nickel hydroxide, the main active material layer containing cobalt in a state of a solid solution, and (b) a compound layer that contains at least one element selected from the group consisting of calcium, aluminum, strontium, scandium, yttrium, and lanthanoide series, the compound layer being formed on a surface of the main active material layer, wherein a metal molar ratio of cobalt contained in the main active material layer to nickel contained in the main active material layer is in a range of 0.5% to 3.0% inclusive, and a metal molar ratio of the at least one element contained in the compound layer to nickel contained in the active material is in a range of 0.3% to 5.0% inclusive, wherein the metal molar ratio of the at least one element selected from the group consisting of calcium, aluminum, strontium, scandium, yttrium, and lanthanoide series is at least 20% in the compound layer formed on the surface of the main active material layer.