(JP7122271-A)      The method involves dissolving ions of other metals from the group consisting of one metal selected from Zn, Cd, Mg, Ca, Mn, Co, Cu and Al. The elution process is carried out using an alkaline aqueous solution. The weight of the metal ions remaining in the nickel hydroxide after the elution process is 5 percent less of the weight of the nickel hydroxide.    The conductive material is a material selected from a group of nickel powder, cobalt powder and cobalt oxide powder. The current collector is a spongy expanded nickel. A PTFE binder and an aq. soln. of CMC as thickener are used with Ni hydroxide and conductive material to form the active material paste.    ADVANTAGE -   Restrains deformation of expansion of the nickel electrode and lowers the discharge capacity of the battery despite repeated charge and discharge of the battery.    (US5549992-A)      A method for mfg. a nickel electrode, comprising: (a) preparing nickel hydroxide contg. metal ions, other than nickel, solidly dissolved in it and then (b) eluting a partial amt. of the metal ions from the nickel hydroxide, thereby preparing a nickel hydroxide to be filled into a current collector; (c) mixing the nickel hydroxide to be filled into a current collector, a conductive material, a binder, and a thickener, to prepare an active material paste; and (d) filling the porous current collector with the active material paste, and moulding the nickel electrode by heating and pressurization.    (EP650207-B1)      The method involves dissolving ions of other metals from the group consisting of one metal selected from Zn, Cd, Mg, Ca, Mn, Co, Cu and Al. The elution process is carried out using an alkaline aqueous solution. The weight of the metal ions remaining in the nickel hydroxide after the elution process is 5 percent less of the weight of the nickel hydroxide.    The conductive material is a material selected from a group of nickel powder, cobalt powder and cobalt oxide powder. The current collector is a spongy expanded nickel. A PTFE binder and an aq. soln. of CMC as thickener are used with Ni hydroxide and conductive material to form the active material paste.    ADVANTAGE -   Restrains deformation of expansion of the nickel electrode and lowers the discharge capacity of the battery despite repeated charge and discharge of the battery.