Cathode materials for Li—S batteries
AssigneeArizona Board of Regents on Behalf of the University of Arizona
InventorsDong-Chul Pyun, Nicholas George Pavlopoulos
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Abstract
Compositions and methods of producing composite materials for use as a cathode in electrochemical cells. Elemental sulfur is mixed with tungsten sulfide (WS2) to form a composite mixture. Organic comonomers may be added to the composite mixture. The composite mixture is reacted to form the composite material. Electrochemical cells with cathodes containing the composite material demonstrated improved battery performance.
Claims15
A composite material comprising:
- at least about 50 wt % sulfur derived from elemental sulfur (S8);
- and
- about 5-50 wt % tungsten sulfide (WS2);
- wherein the elemental sulfur is heated to a liquid;
- wherein the liquid elemental sulfur and WS2 react to produce the composite material.
An electrochemical cell comprising:
- a. an anode comprising lithium;
- b. a cathode comprising a composite material comprising at least about 50 wt % sulfur derived from S8, and about 5-50 wt % tungsten sulfide (WS2), wherein the elemental sulfur is heated to a liquid, wherein the liquid elemental sulfur and WS2 react to produce the composite material;
- and
- c. a non-aqueous electrolyte interposed between the cathode and the anode.
A composite material comprising at least about 50 wt % sulfur derived from elemental sulfur (S8), and about 5-50 wt % tungsten sulfide (WS2);
- wherein the composite material is a vitrified material.
Dependencies are inferred from the claim text.