DEVELOPMENT OF THE METAL-AIR BATTERY SYSTEM.
Quarterly technical rept. no. 1, 1 Jul-30 Sep 65,
YARDNEY ELECTRIC CORP NEW YORK
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Performance characteristics of metal-oxygen couples were determined over the range of 125 to -25F. Evaluation tests were conducted on oxygen electrodes to determine the voltage characteristics over the current density range of 16-800 masq in. Both the silver- and platinum-catalyzed cathodes performed well, with the latter giving about 0.1 volt lower polarization than the former at equivalent current densities. Using the best silver and platinum air electrodes, Al02, Ba02, Ca02, Mg02, and Zn02 cell systems were examined. For the first four anode metals, most of the investigation was of an exploratory nature. This consisted of a search for electrolytes compatible with both the anode and the cathode. Experimentation with the zinc-oxygen couple in an alkaline electrolyte gave the most favorable results. Flat voltage discharge curves were obtained at rates up to the 2C, 800 masq in, at room temperature. An air flow study has been initiated to establish the optimum spacing and venting of adjacent cells. At the 2C rate with a 100 mil. spacing, the free convection of air, resulting from temperature change within the cell, was sufficient to provide the required amount of oxygen to the cathode. Author
- Electrochemical Energy Storage