Nickel electrodes for alkaline secondary battery and alkaline secondary batteries

A sintered nickel electrode, which employs a porous sintered nickel substrate obtained by sintering and is fabricated by chemically impregnating the porous sintered nickel substrate with a salt as an active material, for alkaline secondary battery including the following:

• a porous sintered nickel substrate;
• a first layer which is provided on the above-mentioned porous sintered nickel substrate and is based on a complex compound of nickel and at least one element selected from the group consisting of cobalt, calcium, strontium, scandium, yttrium, lanthanide, bismuth, magnesium and barium;
• and
• a hydroxide nickel-based active material layer provided on the above-mentioned layer.

A nickel electrode for alkaline secondary battery including the following:

• a porous sintered nickel substrate;
• a first layer which is provided on the above-mentioned porous sintered nickel substrate and is based on a complex compound of nickel and at least one element selected from the group consisting of cobalt, calcium, strontium, scandium, yttrium, lanthanide, bismuth, magnesium and barium;
• a nickel hydroxide-based active material layer provided on the above-mentioned first layer;
• and
• a second layer which is provided on the above-mentioned active material layer and is based on a complex compound of nickel and at least one element selected from the group consisting of cobalt, calcium, strontium, scandium, yttrium, lanthanide, bismuth, magnesium, and barium.