Accession Number : AD0632717

Title :   DEVELOPMENT OF THE METAL-AIR BATTERY SYSTEM.

Descriptive Note : Quarterly technical rept. no. 1, 1 Jul-30 Sep 65,

Corporate Author : YARDNEY ELECTRIC CORP NEW YORK

Personal Author(s) : Charkey,Allen

Report Date : APR 1966

Pagination or Media Count : 64

Abstract : 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 ma/sq 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, Al/02, Ba/02, Ca/02, Mg/02, and Zn/02 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 ma/sq 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)

Descriptors :   (*PRIMARY BATTERIES, AIR), ANODES(ELECTROLYTIC CELL), CATHODES(ELECTROLYTIC CELL), PLATINUM, SILVER, CATALYSTS, METALS, OXYGEN, POLARIZATION, ZINC, MAGNESIUM, ALUMINUM, BARIUM, CALCIUM, ALKALI METAL COMPOUNDS, POTASSIUM COMPOUNDS, HYDROXIDES, POROSITY, BATTERY SEPARATORS

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE