Rechargeable prismatic nickel-zinc batteries are being developed for consumer and mobile applications such as electric bicycles, scooters, vehicles and trolling motor for fishing boats. Nickel-zinc deepcycle-life performance was improved through the development of a reduced solubility plastic bonded zinc electrode. Individual cells and battery modules achieved 600 cycles at 100% depth of discharge (DOD) while maintaining a high specific energy up to 60 Whkg. Routinely cycled to failure of cells and batteries were conducted in order to determine the performance and quality of production cells and examined end-of-life (EOL) characteristics of the nickel-zinc system. A destructive physical analysis is performed at the conclusion of testing to establish the failure mechanism. The typical failure mechanism in the cell is dry-out of the cell pack with a concommitant increase in cell intemal resistance and decrease in the utilization of active materials. The thermal behavior of an Evercel model-40 nickel-zinc cell was analyzed.Calorimetric measurements yield a specific heat of
This report covers the work done during the second quarter of the investigation for the U. S. Army Electronics Command. The study is being conducted to determine the performance characteristics and operational parameters for various metal-air couples. The anode materials being examined are Al,
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