Non-aqueous electrochemical cells

• US 20060228624A1
• Filed: 04/08/2005
• Published: 10/12/2006
• Est. Priority Date: 04/08/2005
• Status: Active Grant

• Current Assignee: Duracell U.S. Operations, Inc. (Berkshire Hathaway Incorporated)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: Issaev, Nikolai N., Pozin, Michael
• Granted Patent: US 7,479,348 B2
• Time in Patent Office: Days
• US Class Current: 429/188
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0568 characterised by the solutes
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2300/0025 Organic electrolyte
• CPC Class Codes: H01M 2300/004 Three solvents
• CPC Class Codes: H01M 4/38 of elements or alloys
• CPC Class Codes: H01M 4/382 Lithium H01M4/405 takes precedence
• CPC Class Codes: H01M 4/387 Tin or alloys based on tin
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/665 Composites
• CPC Class Codes: H01M 6/164 by the solvent
• CPC Class Codes: H01M 6/166 by the solute
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

Electrochemical cells are disclosed. In some embodiments, an electrochemical cell includes a cathode, an anode, and an electrolyte having a first lithium salt and LiBF₄.

Claims

1. An electrochemical cell, comprising a cathode, an anode, and an electrolyte comprising a first lithium salt and LiBF₄.

2. The cell of claim 1, wherein the first lithium salt comprises lithium trifluoromethanesulfonate.

3. The cell of claim 1, wherein the electrolyte further comprises a second lithium salt.

4. The cell of claim 3, wherein the second lithium salt is selected from the group consisting of LiPF₆ and lithium trifluoromethanesulphonylimide.

5. The cell of claim 1, wherein the electrolyte comprises from about 300 ppm to about 40,000 ppm of LiBF₄.

6. The cell of claim 1, wherein the first lithium salt comprises lithium trifluoromethanesulfonate, and the electrolyte comprises from about 300 to about 35,000 ppm of LiBF₄.

7. The cell of claim 1, wherein the first lithium salt comprises lithium trifluoromethanesulfonate, the electrolyte further comprises LiPF₆, and the electrolyte comprises from about 300 ppm to about 10,000 ppm of LiBF₄.

8. The cell of claim 1, wherein the first lithium salt comprises lithium trifluoromethanesulfonate, the electrolyte further comprises lithium trifluoromethanesulphonylimide, and the electrolyte comprises from about 300 ppm to about 40,000 ppm of LiBF₄

9. The cell of claim 1, wherein the cathode comprises manganese oxide.

10. The cell of claim 1, wherein the anode comprises lithium.

11. The cell of claim 1, further comprising an aluminum surface or an aluminum couple.

12. The cell of claim 1, wherein the electrolyte further comprises a material selected from the group consisting of ethylene carbonate, propylene carbonate, dimethoxyethane, and butylene carbonate.

13. The cell of claim 1, wherein the electrolyte further comprises propylene carbonate and dimethoxyethane.

14. The cell of claim 13, wherein the electrolyte further comprises ethylene carbonate.

15. The cell of claim 1, wherein the electrolyte further comprises ethylene carbonate, butylene carbonate, and dimethoxyethane.

16. The cell of claim 1, wherein the electrolyte comprises dioxolane.

17. The cell of claim 1, wherein the cell is a primary cell.

18. An electrochemical cell, comprising:

a cathode comprising manganese oxide;

an anode comprising lithium;

an aluminum surface or an aluminum couple; and

an electrolyte comprising lithium trifluoromethanesulfonate and LiBF₄.

19. The cell of claim 18, wherein the electrolyte comprises from about 300 ppm to about 35,000 ppm of LiBF₄.

20. The cell of claim 18, wherein the electrolyte further comprises a third lithium salt selected from the group consisting of LiPF₆ and lithium trifluoromethanesulphonylimide.

21. The cell of claim 20, wherein the electrolyte comprises from about 300 ppm to about 35,000 ppm of LiBF₄.

22. The cell of claim 18, wherein the electrolyte further comprises a material selected from the group consisting of ethylene carbonate, propylene carbonate, dimethoxyethane, butylene carbonate, and dioxolane.

23. The cell of claim 18, wherein the electrolyte further comprises propylene carbonate and dimethoxyethane.

24. The cell of claim 23, wherein the electrolyte further comprises ethylene carbonate.

25. The cell of claim 21, wherein the electrolyte further comprises ethylene carbonate, butylene carbonate, and dimethoxyethane.

26. The cell of claim 21, wherein the electrolyte comprises dioxolane.

27. The cell of claim 21, wherein the cell is a primary cell.

28. A method, comprising:

discharging an electrochemical cell comprising

a cathode comprising manganese oxide,

an anode comprising lithium, and

an electrolyte comprising lithium trifluoromethanesulfonate and LiBF₄; and

disposing the cell without recharging the cell.

29. The method of claim 28, wherein the electrolyte further comprises LiPF₆.