Compacted carbon for electrochemical cells

Title: Compacted carbon for electrochemical cells

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This invention provides compacted carbon that is useful in the electrode of an alkali metal/carbon electrochemical cell of improved capacity selected from the group consisting of: (a) coke having the following properties: (i) an x-ray density of at least 2.00 grams per cubic centimeters, (ii) a closed porosity of no greater than 5%, and (iii) an open porosity of no greater than 47%; and (b) graphite having the following properties: (i) an x-ray density of at least 2.20 grams per cubic centimeters, (ii) a closed porosity of no greater than 5%, and (iii) an open porosity of no greater than 25%. This invention also relates to an electrode for an alkali metal/carbon electrochemical cell comprising compacted carbon as described above and a binder. This invention further provides an alkali metal/carbon electrochemical cell comprising: (a) an electrode as described above, (b) a non-aqueous electrolytic solution comprising an organic aprotic solvent and an electrolytically conductive salt and an alkali metal, and (c) a counterelectrode.

Inventors:

Greinke, Ronald Alfred ^[1]; Lewis, Irwin Charles ^[2]

(Medina, OH)
(Strongsville, OH)

Issue Date:: 1997-01-01

OSTI Identifier:: 871181

Assignee:: UCAR Carbon Technology Corporation (Danbury, CT) CHO

Patent Number(s):: US 5677082

Contract Number:: FC02-91CE50336

Research Org:: US ADVANCED BATTERY CONSORTIUM

Country of Publication:: United States

Language:: English

Subject:: compacted; carbon; electrochemical; cells; provides; useful; electrode; alkali; metal; cell; improved; capacity; selected; consisting; coke; following; properties; x-ray; density; 00; grams; cubic; centimeters; ii; closed; porosity; iii; 47; graphite; 20; 25; relates; comprising; described; binder; non-aqueous; electrolytic; solution; organic; aprotic; solvent; electrolytically; conductive; salt; counterelectrode; cubic centimeter; aprotic solvent; electrolytic solution; electrochemical cells; alkali metal; electrochemical cell; solution comprising; cell comprising; aqueous electrolytic; non-aqueous electrolytic; organic aprotic; compacted carbon; conductive salt; improved capacity; /429/423/

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