| 摘要 |
PROBLEM TO BE SOLVED: To keep electrolyte permeable and prevent a mixture layer from falling by coating a porous sheet with mixture slurry of hydrogen storage alloy powder and thermoplastic resin to form a precursor which is then heated at a specified temperature to melt the resin. SOLUTION: For an electrode, a conductive porous sheet is coated with mixture slurry containing hydrogen storage alloy powder and thermoplastic resin. It is dried to form a hydrogen storage alloy electrode precursor which is then heated to melt the thermoplastic resin and rolled at a preset thickness. In this case, a heating temperature is set to be 5-50 deg.C higher than the melting point of the thermoplastic resin to be used. The thermoplastic resin is vinylidene polyfluoride, polyethylene, polypropylene or polytetrafluoroethylene. The formation of a binder film to prevent the permeation of electrolyte is restrained and the falling of a mixture layer is prevented by the binding force of binder. Electrolyte filling and activating processes are shortened and productivity is improved. |
