DEVELOPMENT OF THE HIGH RATE METAL-AIR DEPOLARIZED BATTERIES.
Quarterly technical rept. no. 4, 1 Apr-30 Jun 66,
YARDNEY ELECTRIC CORP NEW YORK
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The report covers work conducted to determine performance characteristics and operational parameters for various metal-air couples. The anode materials that were examined are Al, Ba, Ca, Mg, and Zn. They should discharge efficiently from -25F to 125F, based on a 30 minute rate to a 50 hour rate. The most efficient system is the Zn-Air system. 16 AH batteries gave utilizations of from 88 to 74 WHlb, depending on c.d. This decrease in energy density is due to a slight decrease in coulombic efficiency and also to a voltage polarization. Low rate discharges of the 16 AH cell show that large air ports result in severe decreases in capacity at high temperatures. At the 50 hour rate, cells with 200 mil ports yielded 50 hours of discharge at -25F, but only 16 hours at 125F. The use of air restriction plates increased the high temperature discharge time to 30 hours. Severe limitation of air flow for high temperature-low rate operation is indicated. Author
- Electrochemical Energy Storage