US5690702A
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Method of making electroactive high storage capacity polycarbon-sulfide materials and electrolytic cells containing same
Assignee: Sion Power Corp
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Filing: 1996-10-07
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Granted: 1997-11-25
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Expires: 2016-10-07
Abstract
Abstract The present invention relates to novel electroactive energy storing polycarbon sulfide (PCS) materials of general formula (CS x ) n wherein x is greater than 2.3 to about 50, and n is greater than 2. This invention also relates to novel rechargeable electrochemical cells containing positive electrode materials comprised of said polycarbon-sulfide materials with improved storage capacity at ambient and sub-ambient temperatures. This invention also relates to novel gel type solid electrolytes useful in high energy storage batteries.
Inventors
- 👤 Terje A. Skotheim
- 👤 Igor P. Kovalev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:24
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0567; H01M10/0565; H01M10/052; H01M4/00; H01M4/02; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
66 words
A method of forming a composite cathode which comprises: coating an electrically conducting cathode substrate with a mixture comprising an amount of an electrochemically active polycarbon-sulfide material effective to provide cathode activity, wherein said polycarbon-sulfide material in its oxidized state is of the general formula I ##STR7## wherein x ranges from greater than 2.5 to about 50, and n is greater than or equal to 2.
Claim 2
Independent Claim
66 words
A method of forming a composite cathode which comprises: coating an electrically conducting cathode substrate with a mixture comprising an amount of an electrochemically active polycarbon-sulfide material effective to provide cathode activity, wherein said polycarbon-sulfide material in its oxidized state is of the general formula I ##STR7## wherein x ranges from greater than 2.5 to about 50, and n is greater than or equal to 2.
Claim 3
Independent Claim
78 words
A method of forming a composite cathode which comprises: coating an electrically conducting cathode substrate with a mixture comprising an amount of an electrochemically active polycarbon-sulfide material, which in its oxidized state, comprises one or more of the polysulfur species of the formulae II-V ##STR8## where m is the same or different at each occurrence and is greater than 2, and y is the same or different at each occurrence and is equal to or greater than 1.
Claim 4
Independent Claim
78 words
A method of forming a composite cathode which comprises: coating an electrically conducting cathode substrate with a mixture comprising an amount of an electrochemically active polycarbon-sulfide material, which in its oxidized state, comprises one or more of the polysulfur species of the formulae II-V ##STR8## where m is the same or different at each occurrence and is greater than 2, and y is the same or different at each occurrence and is equal to or greater than 1.
Claim 5
Dependent Claim
23 words
The method of claim 2, wherein m is the same or different at each occurrence and is equal to or greater than 6.
Claim 6
Dependent Claim
17 words
The method of claim 2, wherein the polymer backbone chain of said polycarbon-sulfide material comprises conjugated segments.
Claim 7
Dependent Claim
18 words
The method of claim 2 or 3, wherein said polycarbon-sulfide material comprises the polysulfur species of formula V.
Claim 8
Dependent Claim
36 words
The method of claim 5, wherein said polysulfur species of formula V is attached by one or both of its terminal sulfur atoms as a side group to the polymer backbone chain of said polycarbon-sulfide material.
Claim 9
Dependent Claim
30 words
The method of claim 5, wherein said polysulfur species of formula V is incorporated by attachment of its terminal sulfur atoms into the polymer backbone chain of said polycarbon-sulfide material.
Claim 10
Dependent Claim
17 words
The method of claim 5, wherein the polymer backbone chain of said polycarbon-sulfide material comprises conjugated segments.
Claim 11
Dependent Claim
33 words
The method of claim 2, wherein said polysulfur species of formula II, III, or IV is incorporated by attachment of its double-bonded carbon atoms into the polymer backbone chain of said polycarbon-sulfide material.
Claim 12
Dependent Claim
17 words
The method of claim 9, wherein the polymer backbone chain of said polycarbon-sulfide material comprises conjugated segments.
Claim 13
Dependent Claim
31 words
The method of claim 1 or 2, wherein said polycarbon-sulfide material upon electrochemical reduction and oxidation does not undergo depolymerization and repolymerization of the polymer backbone chain of said polycarbon-sulfide material.
Claim 14
Independent Claim
91 words
A method of forming an electric current producing cell comprising: (a) providing an anode comprised of a metal selected from the group consisting of metals belonging to group IA and group IIA of the Periodic Table of the elements; (b) providing a composite cathode comprised of a polycarbon-sulfide material, which in its oxidized state, is of the general formula I ##STR9## wherein x ranges from greater than 2.5 to about 50, and n is greater than or equal to 2; and (c) enclosing an electrolyte between said anode and said cathode.
Claim 15
Independent Claim
91 words
A method of forming an electric current producing cell comprising: (a) providing an anode comprised of a metal selected from the group consisting of metals belonging to group IA and group IIA of the Periodic Table of the elements; (b) providing a composite cathode comprised of a polycarbon-sulfide material, which in its oxidized state, is of the general formula I ##STR9## wherein x ranges from greater than 2.5 to about 50, and n is greater than or equal to 2; and (c) enclosing an electrolyte between said anode and said cathode.
Claim 16
Independent Claim
108 words
A method of forming an electric current producing cell comprising: (a) providing an anode comprised of a metal selected from the group consisting of metals belonging to group IA and group IIA of the Periodic Table of the elements; (b) providing a composite cathode comprised of a polycarbon-sulfide material, which in its oxidized state, comprises one or more polysulfur species of formula II-V ##STR10## where m is the same or different at each occurrence and is greater than 2, and y is the same or different at each occurrence and is equal to or greater than 1; and (c) enclosing an electrolyte between said anode and said cathode.
Claim 17
Independent Claim
108 words
A method of forming an electric current producing cell comprising: (a) providing an anode comprised of a metal selected from the group consisting of metals belonging to group IA and group IIA of the Periodic Table of the elements; (b) providing a composite cathode comprised of a polycarbon-sulfide material, which in its oxidized state, comprises one or more polysulfur species of formula II-V ##STR10## where m is the same or different at each occurrence and is greater than 2, and y is the same or different at each occurrence and is equal to or greater than 1; and (c) enclosing an electrolyte between said anode and said cathode.
Claim 18
Dependent Claim
23 words
The method of claim 13, wherein m is the same or different at each occurrence and is equal to or greater than 6.
Claim 19
Dependent Claim
31 words
The method of claim 12 or 13, wherein said polycarbon-sulfide material upon electrochemical reduction and oxidation does not undergo depolymerization and repolymerization of the polymer backbone chain of said polycarbon-sulfide material.
Claim 20
Dependent Claim
50 words
The method of claim 12 or 13, wherein said anode material is comprised of one or more materials selected from the group consisting of lithium-aluminum alloys, lithium intercalated carbons, sodium intercalated carbons, sodium-lead alloys, lithium-lead alloys, lithium-tin alloys, lithium-silicon alloys, lithium doped polyacetylenes, sodium doped polyacetylenes, and lithium doped polyphenylenes.
Claim 21
Dependent Claim
31 words
The method of claim 12 or 13, wherein said cathode further comprises one or more of the materials selected from the group consisting of non-aqueous electrolytes, conductive fillers, and inert binders.
Claim 22
Dependent Claim
33 words
The method of claim 12 or 13, wherein said electrolyte comprises one or more materials selected from the group consisting of solid polymer electrolytes, single-ion-conducting polymer electrolytes, gel polymer electrolytes, and liquid electrolytes.
References Cited (Backward Citations)
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