Patent ID: 8057934

Claim:
A nickel electrode for an alkaline secondary battery, comprising: an electrically conductive base plate, and an active material particle supported on the conductive base plate and comprising a complex particle with a surface layer that comprises a high-order cobalt compound whose oxidation number of cobalt is higher than +2 on a surface of a core layer particle that comprises a high-order nickel hydroxide whose oxidation number of nickel is higher than +2; wherein lithium (Li) is contained to be a solid solution in said cobalt compound that forms the surface layer and the nickel hydroxide that forms the core layer, from 0.01 to 0.5 wt % of a converted amount as a lithium metal by weight of lithium metal divided by a total weight of the high-order nickel hydroxide, the high-order cobalt compound and the lithium metal.