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Electrochemistry of Some New Alkaline Battery Electrodes
AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OH
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New alkaline battery electrodes used in cells such as nickel oxide- cadmium, nickel oxide-hydrogen, nickel oxide-zinc, and silver oxide-zinc have been developed as a result of contracted and in-house research at the Air Force Aero-Propulsion Laboratory. Cathodic hydroxide precipitation techniques are used for preparation of nickel oxide and cadmium electrodes. Bipolar silver oxide- zinc electrodes are fabricated by spray deposition-sintering and vapor deposition techniques. Novel methods for preparation of dry charged nickel oxide electrodes for reserve type nickel oxide-zinc batteries are being investigated. One technique involves charging conventional sintered, vacuum impregnated electrodes then removing electrolyte with a distilled water wash. Drying is performed in vacuo. The plates yield rated capacity upon activation, but on long term dry storage data is available. Secondary nickel oxide electrodes, prepared by cathodic precipitation techniques, appear far superior to other nickel oxide electrodes because of their reduced thickening with charge-discharge cycling at deep depths of discharge and their good charge acceptance at high temperatures. The silver oxide-zinc electrode fabrication techniques have made construction of a multicell pile for high power applications feasible. Minor problems such as anomalous gassing have been incurred but appear capable of solution.
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