Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Reexamination Certificate
2005-07-12
2005-07-12
Crepeau, Jonathan (Department: 1746)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
C429S303000, C429S224000, C429S229000, C429S246000
Reexamination Certificate
active
06916577
ABSTRACT:
An alkaline cell having an anode comprising zinc, a cathode comprising manganese dioxide and an electrolyte comprising polyvinylbenzyltrimethylammoniumhydroxide. The anode can comprise particulate zinc dispersed within an aqueous gel comprising crosslinked polyvinylbenzyltrimethylammoniumhydroxide polymer. Optionally, aqueous KOH can be added to the gel. The anode and cathode are desirably in the shape of a slab each having a pair of opposing parallel flat faces defining two opposing ends. The zinc particles dispersed in crosslinked polyvinylbenzytrimethylammoniumhydroxide polymer can be concentrated at one end of the anode slab with the opposing end being clear of zinc. The clear end of the anode preferably also comprising polyvinylbenzlytrimethylammoniumhydroxide functions as a separator between anode and cathode. The cathode slab comprises a mixture of particulate manganese dioxide, graphite, and linear polyvinylbenzyltrimethylammoniumhydroxide polymer. The polyvinylbenzyltrimethylammoniumhydroxide polymer functions to bind the manganese dioxide particles and also functions as electrolyte during cell discharge.
REFERENCES:
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patent: 5760088 (1998-06-01), Walker
patent: 510239 (1992-10-01), None
Peregudov, Y. et al., “Thermodynamic parameters of dilution and mixing of the solutions of poly(vinylbenzyltrimethylammonium) in various forms,” Vysokomolekulyarnye Soedineniya, Seriya A i Seriya B, 40(7), 1224-1227, 1998 (no month), abstract.
Matusevich, V., et al., “Electric conductivity of aqueous solutions of polyvinylbenzyltrimethylammonium hydroxide and salts,” Vestsi Akademii Navuk BSSR, Seryya Khimichnykh Navuk, (3) 11-14, 1986 (no month), abstract.
L. C. Hardy and D.F. Shriver, “Preparation and Electrical Response of Solid Polymer Electrolytes..”, J. Am. Chem. Soc., (1985) vol. 107, p. 3823-3828.
E. Agel, J. Bouet, and J.F. Fauvarque, “Characterization and Use of Anionic Membranes for Alkaline Fuel Cells”, Journal of Power Sources, (2001) vol. 101, p. 267-274.
E. Agel, J. Bouet, J. Fauvarque, and H. Yassir, “Utilization of Solid Polymer Electroyte”, Ann. Chim. Sci. Mat. (2001), vol. 26(4), p. 59-68.
English language translation for: Eric Agel, J. Bouet, J.F. Fauvarque, and H. Yassir, Use of Solid Polymer Electrolyte in Alkaline Fuel Cells, Ann. Chim. Sci. Mat. 2001, vol. 26 (4), pp. 59-68.
Boulton Jonathan M.
Fooksa Radek
Parent C. Robert
Crepeau Jonathan
Josephs Barry D.
Krivulka Thomas G.
The Gillette Company
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