Patent ID: 7842421

Claim:
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.