Accession Number : AD0650780

Title :   DEVELOPMENT OF THE HIGH RATE METAL-AIR DEPOLARIZED BATTERIES.

Descriptive Note : Rept. no. 5, 1 Jul 65-30 Sep 66 (Final),

Corporate Author : YARDNEY ELECTRIC CORP NEW YORK

Personal Author(s) : Blossom,Ray

Report Date : MAR 1967

Pagination or Media Count : 56

Abstract : The goal of this contract was the development of a 32 volt - 10 watt primary metal-air battery with a specific energy in excess of WH/lb. The principal work was an investigation of zinc, magnesium, aluminum, calcium, and barium electrodes coupled with an air reducing cathode in aqueous electrolyte systems. This study included the discharge performance of the above cells at various current densities over a temperature range of -25F to +125F. During the fifth, and final, quarterly period the relationship between air supply and metal-air cell behavior was studied. Experimental air polarization data obtained from this study are given. From the heat transfer analysis of these data, a method of correlating cell pack temperature with the convective air flow rate was derived. Zinc-air gave best discharge performance over the current density and temperature range investigated. Of the group of cell systems studied, zinc-air was the only metal-air cell which met ECOM requirements for the 32 volt battery. Six 26 cell - 16 AH zinc-air batteries were fabricated. Construction and performance details are given. (Author)

Descriptors :   (*PRIMARY BATTERIES, *ELECTRODES), AIR, REDUCTION(CHEMISTRY), POLARIZATION, GAS FLOW, HEAT TRANSFER, CATHODES(ELECTROLYTIC CELL), ZINC, ELECTRICAL PROPERTIES, CONSTRUCTION, PERFORMANCE(ENGINEERING)

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE