Accession Number : AD0635773

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

Descriptive Note : Quarterly technical rept. no. 3, 1 Jan-31 Mar 66.

Corporate Author : YARDNEY ELECTRIC CORP NEW YORK

Personal Author(s) : Charkey, Allen

Report Date : JUL 1966

Pagination or Media Count : 52

Abstract : A study was conducted to determine the performance characteristics and operational parameters for various metal-air couples. The anode materials being examined are Al, Ba, Ca, Mg, and Zn. They must discharge efficiently from -25F to 125F at rates from the 30 minute to 50 hour. Bootstrap heating for a 5 cell zinc-air battery was investigated at -25F. Useful capacity at the C/4 rate was about one half that obtained at room temperature and about double what would be obtained at -25F without bootstrap heating. Full sized 16 ampere-hour cells were designed, fabricated and tested. The watt-hour per pound performance of the finished prototype was in excess of 100 watt-hrs/lb. at the 1C discharge rate. A magnesium-air system of high efficiency was developed. The improvementx was obtained by using sodium and lithium perchlorate instead of magnesium perchlorate electrolyte. Also, a eutectic solution of these two perchlorate salts gave acceptable performance down to -15F. Aluminum-air cells were studied in a free rather than an immobilized electrolyte system. The best performance was obtained in an electrlyte consisting of 20% KOH and 10% NaCl saturated with ZnO. Calcium anode behavior was studied in the polarization cell and in working calcium-air cells. The work quarter consisted of finding an electrolyte which was compatible with both the anode and cathode. (Author)

Descriptors :   (*PRIMARY BATTERIES, AIR), PERFORMANCE(ENGINEERING), ANODES(ELECTROLYTIC CELL), CATHODES(ELECTROLYTIC CELL), ALUMINUM, ZINC, MAGNESIUM, CALCIUM, ELECTROLYTES, POLARIZATION

Subject Categories : Electrochemical Energy Storage

Distribution Statement : APPROVED FOR PUBLIC RELEASE