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US 7,842,421 B2Granted
Electrolytes for lithium sulfur cells
AssigneeSion Power Corporation
InventorYuriy Mikhaylik
Life of this patent
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Abstract
Disclosed is an additive for an electrochemical cell wherein the additive includes an N—O bond. The additive is most preferably included in a nonaqueous electrolyte of the cell. Also disclosed are cells and batteries including the additive, and methods of charging the batteries and cells. An electrochemical cell including the additive preferably has an anode that includes lithium and a cathode including an electroactive sulfur-containing material.
Claims34
An electrochemical cell comprising:
- (a) a cathode comprising an electroactive sulfur-containing material;
- (b) an anode comprising lithium;
- and
- (c) a nonaqueous electrolyte, wherein the electrolyte comprises:
- (i) one or more nonaqueous solvents selected from the group consisting of acyclic ethers, cyclic ethers, polyethers, and sulfones;
- (ii) one or more lithium salts;
- and
- (iii) one or more N—O additives selected from one or more of the group consisting of potassium nitrate, cesium nitrate, barium nitrate, and ammonium nitrate, nitropropane, nitrobenzene, dinitrobenzene, nitrotoluene, dinitrotoluene, nitropyridine, nitrobutanes, and dialkyl imiazolium.
5 more elements
An electrochemical cell comprising:
- (a) a cathode comprising an electroactive sulfur-containing material;
- (b) an anode comprising lithium;
- and
- (c) a nonaqueous electrolyte, wherein the electrolyte comprises:
- (i) one or more nonaqueous solvents selected from the group consisting of acyclic ethers, cyclic ethers, polyethers, and sulfones;
- and
- (ii) one or more N—O additives selected from one or more of the group consisting of organic nitrates, inorganic nitrites, potassium nitrate, cesium nitrate, barium nitrate, and ammonium nitrate.
4 more elements
Dependencies are inferred from the claim text.