| abstract |
A positive nickel hydroxide active substance intended for an alkaline battery (A) contains a nickel hydroxide powder having a valence, for nickel, greater than 2, and a cobalt compound having a valence, for cobalt, greater than 2, which is formed on the surface of said nickel hydroxide powder. For example, the surface of a nickel oxyhydroxide powder is coated with a layer of cobalt oxyhydroxide. This positive active substance is used as a starting material to produce an electrode by retention of this substance in a three-dimensional porous material. |