Method of making electroactive high storage capacity polycarbon-sulfide materials and electrolytic cells containing same
AssigneeMoltech Corporation
InventorsTerje A. Skotheim, Igor P. Kovalev
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Abstract
The present invention relates to novel electroactive energy storing polycarbon sulfide (PCS) materials of general formula (CS.sub.x).sub.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.
Claims18
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.
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.
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.
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.
Dependencies are inferred from the claim text.