| 摘要 |
PURPOSE:To suppress increase of nickel nitrate concentration by using together a nickel electrode and an insoluble electrode as a counter electrode of a porous electrode substrate in an electricdeposion method which deposites nickel hydroxide on an electrode substrate. CONSTITUTION:A porous nickel sintered substrate 3 which is anodically charged is accommodated in an electrolytic bath 1, and on its both sides, insoluble electrodes 2a comprising platinum plated titanium and soluble nickel electrodes 2b are mutually arranged and a pair of counter electrode 2 which are cathodically charged are accommodated. Electrolysis is conducted in an electrolyte containing nickel nitrate, and nickel hydroxide is deposited on the porous substrate 3 to form a nickel positive electrode for an alkaline battery. By using the insoluble electrode 2a in a ratio of 20-70%, increase of nickel nitrate concentration in the electolyte is suppressed and an electrode having high capacity density can be obtained. |
