CHARACTERISTICS OF OXYGEN ELECTRODES FOR LOW-TEMPERATURE FUEL CELLS
HARRY DIAMOND LABS ADELPHI MD
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Available information was assembled and evaluated on the methods of preparation and the physical and electrochemical characteristics of oxygen for electrodes for low-temperature fuel cells. Porous carbon and sintered metal cathodes have been considered with reference to methods of preparation, mode of operation, electrochemical characteristics, and other properties. Such electrodes are capable of operation in strongly alkaline electrolytes at current densities of several hundred amperes per square foot for extended periods of time. Electrodes of noble metals, such as platinized platinum, are used in fuel cells in combination with an acidic or alkaline ion-exchange membrane electrolyte. Because of the slowness with which hydrogen peroxide is decomposed in acid media, fuel cells with acid electroytes do not ordinarily operate at current densities greater than 20 ampsq ft.
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