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US 6,936,382 B2Granted
Lithium batteries
AssigneeMoltech Corporation
InventorsYuriy V. Mikhaylik, Terje A. Skotheim, Boris A. Trofimov
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Abstract
Provided is a lithium battery in which the cathode comprises an electroactive sulfur-containing material and the electrolyte comprises a lithium salt, a non-aqueous solvent, and one or more capacity-enhancing reactive components. Suitable reactive components include electron transfer mediators. Also are provided methods for making the lithium battery.
Claims16
An electrochemical cell comprising:
- (a) a solid lithium anode;
- (b) a solid cathode comprising an electroactive sulfur-containing material;
- and
- (c) a non-aqueous electrolyte interposed between the anode and the cathode wherein the electrolyte comprises:
- (i) one or more lithium salts;
- (ii) one or more non-aqueous solvents;
- and
- (iii) one or more capacity-enhancing reactive components;
- wherein said capacity-enhancing reactive components comprise an electron transfer mediator selected from the group consisting of the mediator of the formula:
- and the mediator of the formula:
- wherein:
- Z is the same or different at each occurrence and is selected from the group consisting of O, S, Se, and NR5, where R5 is alkyl, aryl, or substituted derivatives thereof;
- R is the same or different at each occurrence and is selected from the group consisting of alkyl, aryl, F, Cl, CF3, CF3SO2, and N(R6)2, where R6 is alkyl, aryl, or substituted derivatives thereof;
- Y is —C═C— or
- t is an integer from 0 to 4;
- and
- u is an integer from 1 to 6.
14 more elements
A method of making an electrochemical cell comprising the steps of:
- (a) providing a solid lithium anode;
- (b) providing a solid cathode comprising an electroactive sulfur-containing material;
- and
- (c) interposing a non-aqueous electrolyte between the anode and the cathode, wherein the electrolyte comprises:
- (i) one or more lithium salts;
- (ii) one or more non-aqueous solvents;
- and
- (iii) one or more capacity-enhancing reactive components;
- wherein the capacity-enhancing reactive components comprise an electron transfer mediator selected from the group consisting of the mediator of the formula:
- and the mediator of the formula:
- wherein:
- Z is the same or different at each occurrence and is selected from the group consisting of O, S, Se, and NR5, where R5 is alkyl, aryl, or substituted derivatives thereof;
- R is the same or different at each occurrence and is selected from the group consisting of alkyl, aryl, F, Cl, CF3, CF3SO2, and N(R6)2, where R6 is alkyl, aryl, or substituted derivatives thereof;
- Y is —C═C— or
- t is an integer from 0 to 4;
- and
- u is an integer from 1 to 6.
14 more elements
Dependencies are inferred from the claim text.