ELECTROLYTES FOR LITHIUM SULFUR CELLS
First Claim
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1. 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,wherein the cell exhibits utilization of the electroactive sulfur-containing material of at least 60% and a charge-discharge efficiency of at least 80% over at least 10 cycles at a charge rate of about 0.2 mA/cm2 and a discharge rate of about 0.4 mA/cm2.
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Abstract
Disclosed is an electrochemical cell comprising a lithium anode and a sulfur-containing cathode and a non-aqueous electrolyte. The cell exhibits high utilization of the electroactive sulfur-containing material of the cathode and a high charge-discharge efficiency.
51 Citations
31 Claims
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1. An electrochemical cell comprising:
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(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,wherein the cell exhibits utilization of the electroactive sulfur-containing material of at least 60% and a charge-discharge efficiency of at least 80% over at least 10 cycles at a charge rate of about 0.2 mA/cm2 and a discharge rate of about 0.4 mA/cm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification