EP0638947A1
Expired / Lapsed
EP
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High capacity cathodes for secondary cells
Assignee: Sion Power Corp
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Filing: 1994-06-16
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Granted: —
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Expires: 2014-06-16
Abstract
Abstract The present invention relates to an electric current producing cell which contains an anode, a polymer electrolyte which is chemically inert with respect to the anode and the cathode, and a composite cathode having an organo-sulfur compound as a cathode active material, a conjugated polymer for the transport of electrons and a polymer electrolyte for the transport of ions.
Inventors
- 👤 Terje A. Skotheim
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 22:19
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/137; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911; Y10T29/49115
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
74 words
An electric current producing cell, comprising: (a) an anode; (b) a composite cathode containing poly(carbon disulfide) as cathode active material; a p-doped conjugated polymer which enhances the cell voltage against the anode and provides transport of electrons; and an electrolyte for the transport of ions; and (c) an electrolyte which is chemically inert with respect to said anode and said cathode and which permits the transportation of ions between said anode and said cathode.
Claim 2
Dependent Claim
24 words
The cell of Claim 1, wherein said conjugated polymer is selected from polyaniline, polyacetylene, polypyrrole, polythiophene, poly(p-phenylene), poly(p-phenylene vinylene), poly(2,5-thienylene vinylene), and their derivatives.
Claim 3
Dependent Claim
81 words
The cell of Claim 1, wherein said anode comprises a material selected from the group consisting of one or more alkali metals, a mixture of one or more alkali metals, one or more alkaline earth metals, alkali metal intercalated carbon, composites of an n-doped conjugated polymer and an alkali metal, composites of an n-doped conjugated polymer and an alkali metal alloy, and an alkali metal with a film of an n-doped conjugated polymer interposed between said alkali metal and the electrolyte.
Claim 4
Dependent Claim
24 words
The cell of Claim 3, wherein said conjugated polymer is selected from the group consisting of poly(p-phenylene), poly(p-phenylene vinylene), and polyacetylene and their derivatives.
Claim 5
Dependent Claim
24 words
The cell of Claim 3, wherein said alkali metal alloy is selected from the group consisting of lithium-aluminium, lithium-silicon, lithium-antimonide, lithium-tin, lithium-lead, and sodium-lead.
Claim 6
Dependent Claim
36 words
The cell of Claim 1, wherein said cathode active material is poly(carbon disulfide) having the formula (CS x/n ), wherein x is from about 1.7 to about 2.3 and n is an integer greater than 2.
Claim 7
Dependent Claim
38 words
The cell of Claim 1, wherein said cathode active material is poly(carbon disulfide) having the formula (CS x ) n , wherein x is from about 1.7 to about 2.3 and n is an integer greater than 20.
Claim 8
Dependent Claim
38 words
The cell of Claim 1, wherein said cathode active material is poly(carbon disulfide) having the formula (CS x ) n , wherein x is from about 1.7 to about 2.3 and n is an integer greater than 50.
Claim 9
Dependent Claim
38 words
The cell of Claim 1, wherein said electrolyte is selected from the group consisting of solid polymer electrolytes, single-ion cation conducting polymer electrolytes, wherein the anionic moiety is covalently attached to the polymer backbone, and gel polymer electrolytes.
Claim 10
Dependent Claim
24 words
The cell of Claim 9, wherein said single-ion conducting polymer electrolyte is a single lithium or sodium ion conducting polymer having a polysiloxane backbone.
Claim 11
Dependent Claim
38 words
The cell of Claim 9, wherein the gel polymer electrolyte is a single-ion conducting polymer electrolyte plasticized with low molecular weight compounds selected from propylene carbonate, ethylene carbonate, N-methyl acetamide, sulfonate, sulfolane, poly(ethylene glycol), 1,2-dimethoxy-ethane, glymes and 1,3-dioxolane.
Claim 12
Dependent Claim
34 words
The cell of Claim 1, wherein said electrolyte is an alkali metal salt selected from the group consisting of MClO₄, MSO₃CF₃, MBF₄, MAsF₆, MPF₆, M(CF₃SO₂)₂N, MSO₂(CF₂)₄SO₂N and M(CP₃SO₂)₃C, where M is Li or Na.
Claim 13
Independent Claim
41 words
A method of forming a composite cathode which comprises: coating an electrically conducting cathode substrate with a mixture comprising an effective amount of poly(carbon disulfide), an effective amount of a p-doped conjugated polymer, and an effective amount of a polymer electrolyte.
Claim 14
Independent Claim
148 words
A method of forming a solid state rechargeable battery which comprises: (a) providing a solid anode formed from material selected from the group consisting of one or more alkali metals, one or more alkaline earth metals, alkali metal intercalated carbon, composites of an n-doped conjugated polymer and an alkali metal, composites of an n-doped conjugated polymer and an alkali metal alloy, and an alkali metal with a film of an n-doped conjugated polymer interposed between said alkali metal and the eletrolyte; (b) providing a composite cathode formed by coating a current collecting cathode substrate with a mixture comprising an effective amount of poly(carbon disulfide) with an effective amount of a p-doped conjugated polymer, and an effective amount of a polymer electrolyte. (c) enclosing between said anode and said cathode an electrolyte selected from the group consisting of solid polymer electrolytes, single-ion conducting polymer electrolytes and gel polymer electrolytes.
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