Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state
Patent
1977-02-28
1978-08-29
Weston, Caleb
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
Active material in molten state
156 89, C04B 3700
Patent
active
041105150
ABSTRACT:
A method of preparing a composite body comprising a vitreous carbon substrate having a felt prepared from materials selected from the group consisting of metal, carbon and graphite bonded to a major surface thereof, wherein said method comprises
(A) forming and curing a branched polyphenylene prepolymer having a number average molecular weight of between about 500 and 800 and bearing terminal acetylene functionality to form a shaped, crosslinked body; (B) preparing a solution of said branched polyphenylene prepolymer in an organic solvent in an amount ranging from about 1 to about 60 parts by weight of said prepolymer per 100 parts by weight of said solution; (C) preparing a composite of said shaped body and said felt to be bonded thereto with said solution interposed therebetween; and (D) firing said composite in an inert atmosphere at a temperature of at least about 800.degree. C. until the polymer in said solution and said shaped body is converted to vitreous carbon and said shaped body is integrally bonded to said graphite felt. The composite body so formed may be employed in a secondary battery or cell wherein the felt serves as a cathodic electrode and the shaped body serves as a current collector.
REFERENCES:
patent: 3811943 (1974-05-01), Minck et al.
patent: 3982957 (1976-09-01), Jones et al.
patent: 3982959 (1976-09-01), Partridge et al.
Ford Motor Company
May Roger L.
Weston Caleb
Zerschling Keith L.
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