This project will demonstrate the performance characteristics of a high-energy-density, rechargeable battery based on the nickel-metal-hydride system with an energy density of 70 Wh/Kg and over 200 Wh/l. These values are almost three times that of a lead-acid and more than two times that of a nickel-cadmium system. Nickel-metal-hydride batteries, under development by the firm for some time, have demonstrated good energy density, easy manufacturability, and environmentally benign disposition. By utilizing some of the new high-specific-capacity, metal-hydride-alloy negative electrodes and new lightweight positive electrodes, the project will fabricate and test prismatic starved cells of greater than 5 Ah, yielding 70 Wh/Kg in gravimetric energy density and more than 200 Wh/l in volumetric energy density. The cells will be tested for capacity, rate capability, and temperature performance. Phase II will make and test many individual prismatic, starved cells. Once reproducible results are obtained, Phase II will make and test battery modules using these individual cells.
Potential Commercial Applications:This technology can be used on earth in portable computers, cordless power tools, cellular telephones, walkie-talkie radios, medical appliances, household battery-operated appliances, toys, and portable c.d. players. These batteries will be useful to equipment manufacturers and designers who have sought long-running and high-powered cordless power sources.
