Non-sintered positive electrode for alkaline storage battery and alkaline storage battery using the same

摘要

The present invention provides alkaline storage batteries high in energy density and excellent in overdischarge resistance, and, besides, less in decrease of capacity even if charging and discharging cycle is repeated at high temperatures. There is used a positive electrode comprising a foamed nickel substrate having the number of pores of 80-160 pores/inch (PPI2D) and a thickness of skeleton of 30-60 mu m in which spherical nickel hydroxide solid solution particles having an average particle size of 5-20 mu m and a cobalt oxide conductive agent having an average particle size of 1 mu m or less and mainly composed of gamma -cobalt oxyhydroxide having a cobalt valence of higher than 3.0 are held and the total occupying ratio of the spherical nickel hydroxide solid solution particles and the cobalt oxide conductive agent based on the whole electrode plate is in the range of 75-85 vol%.