Electrochemical cell anode and high discharge rate electrochemic

Details Electrochemical cell anode and high discharge rate electrochemic Electrochemical cell anode and high discharge rate electrochemic

1998-02-24

2000-07-11

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429212, 429229, H01M 442

Patent

active

060870303

ABSTRACT:
This invention pertains to novel alkaline electrochemical cells having high drain capacities, especially cells having high drain rate capabilities at voltages of at least 1.1 volts for use in small appliances such as hearing aids. The anode includes anode material in the cells including potassium hydroxide, zinc powder, 0.02% to 0.5% of a reaction rate enabling compound selected from a compound of indium, cadmium, gallium, thallium, germanium, tin, or lead, with indium compounds being preferred. The anode material optionally further includes a low level of mercury, and preferably a surfactant comprising hydroxyethylcellulose. The cathode provides sufficient oxidative capability to oxidize the zinc at a sufficient rate to support the electrical drain demands on the cell. A cathode, in a preferred zinc air cell for a hearing aid, includes at least 5 air ports, evenly distributed over the surface of the bottom of the cathode can. Cells of the invention exhibit prolonged operation at relatively constant voltage over 1.1 volts, and relatively constant power output at a power density of at least about 210 milliwatts per square inch of the reaction surface area of the cathode assembly, for periods significantly longer than conventional cells of the same type.

REFERENCES:
patent: 4084047 (1978-04-01), Himy et al.
patent: 4288913 (1981-09-01), Parsen et al.
patent: 4332870 (1982-06-01), Parsen et al.
patent: 4380578 (1983-04-01), Bahary
patent: 4435488 (1984-03-01), Bahary et al.
patent: 4455358 (1984-06-01), Graham et al.
patent: 4579791 (1986-04-01), Wang
patent: 4585710 (1986-04-01), McEvoy
patent: 4585716 (1986-04-01), Chalilpoyil et al.
patent: 4608325 (1986-08-01), Ismail
patent: 4681698 (1987-07-01), Graham et al.
patent: 4722763 (1988-02-01), Pa et al.
patent: 4777100 (1988-10-01), Chalilpoyil et al.
patent: 4840644 (1989-06-01), Chalilpoyil et al.
patent: 4861688 (1989-08-01), Miura et al.
patent: 5721065 (1998-02-01), Collien et al.
patent: 5773176 (1998-06-01), Serenyi
Morse, E.M., Zinc-Oxygen Battery System, 19th Annual Power Sources Conferences, May 18-20, 1965, p. 109-112.
Arregui, J.; Shimotake, H., Universal Application of the Zinc-air System in Batteries, Progress in Batteries and Solar Cells, vol. 5, 1984, p. 136-138 (Month unknown).
Nonomura, Eiichi, Recent Directions in Hearing Aids, Japan Acoustics Society Magazine, vol. 45, #7. (Jul. 1989).
Hajime Konishi, Takjashi Yokoyama: Zinc-air Batteries for Pagers, National Technical Report, vol. 37, No. 1, Feb. 1991, p. 38-43.
Sieminski, Dennis, Recent Advances in Rechargeable Zinc-air Battery Technology, The Twelfth Annual Battery Conference on Applications and Advances, 1997, p. 171-180. (Month unknown).

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