| 摘要 |
PURPOSE:To improve and stabilize the active substance utilization efficiency of a foaming metal type nickel positive electrode especially when it is filled at a high density, by including line particles of metallic silver or silver oxide in the particles of nickel hydroxide which comprises the main body of the active substance. CONSTITUTION:In a nickel positive electrode composed of a metallic holding body and an active substance mainly of nickel hydroxide filled inside or spread over the surface of the metallic holding body, the nickel hydroxide contains silver in the condition of a metallic silver or a silver oxide. Therefore, since the silver oxidized to Ag2O or AgO in the charge reaction is reduced to the metallic silver in the discharge reaction, the electron conductivity in the nickel hydroxide active substance particles is improved, and the utilization rate of the nickel hydroxide active substance is also improved. Such a reaction is exclusive to the sliver which is reduced to the metallic condition of a good electron conductivity from the hydroxide. Moreover, the existance of silver which can be a positive active substance in the spaces produced necessarily in the nickel hydroxide particles can improve the capacity density without increasing the volume of the active substance. |
