ELECTROLYTE ADDITIVE FOR PERFORMANCE STABILITY OF BATTERIES

• US 20090181302A1
• Filed: 03/27/2009
• Published: 07/16/2009
• Est. Priority Date: 01/31/2006
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Chen, Kaimin, Schmidt, Craig L., Merritt, Donald R.
• Application Number:
  US12/412,595
• Publication Number:
  US 20090181302A1
• Time in Patent Office: Days
• US Class Current: 429/207
• CPC Class Codes: H01M 2300/0037 Mixture of solvents
• CPC Class Codes: H01M 4/382 Lithium H01M4/405 takes precedence
• CPC Class Codes: H01M 4/405 Alloys based on lithium
• CPC Class Codes: H01M 4/483 for non-aqueous cells H01M4/485 takes precedence
• CPC Class Codes: H01M 4/502 for non-aqueous cells H01M4/505 takes precedence
• CPC Class Codes: H01M 4/54 of silver
• CPC Class Codes: H01M 6/168 by additives

Abstract

An organic additive to an electrolyte for a battery cell in an implantable medical device is presented. At least one organic additive is selected from a group comprising one of lithium salicylate, hydroxyphthalic anhydride, a hydroxybenzoic acid, salicylate ester, salicylamide, and salicylanilide.

Claims

1-8. -8. (canceled)

9. An implantable medical device comprising a battery comprising an electrode assembly and an electrolyte, wherein the electrolyte comprises a liquid electrolyte and a performance enhancing additive, wherein the performance enhancing additive comprises an organic compound comprising hydroxy and carboxy groups.

10. The implantable medical device of claim 9 wherein the electrode assembly comprises an anode comprising an element selected from the group of a Group IA element and a Group IIA element.

11. The implantable medical device of claim 10 wherein the anode comprises material selected from the group of a Group IA metal, an alloy thereof, and an intermetallic compound thereof.

12. The implantable medical device of claim 11 wherein the anode comprises a Group IA element in metallic form.

13. The implantable medical device of claim 11 wherein the anode comprises a Group IA element in ionic form.

14. The implantable medical device of claim 10 wherein the electrode assembly comprises a lithium anode.

15. The implantable medical device of claim 9 wherein the liquid electrolyte comprises a lithium salt, propylene carbonate, and dimethoxyethane.

16. The implantable medical device of claim 9 wherein the electrode assembly comprises a cathode comprising a metal oxide.

17. The implantable medical device of claim 16 wherein the cathode comprises a metal oxide selected from the group of vanadium oxide, silver vanadium oxide, manganese oxide, and lithium vanadium oxide.

18. The implantable medical device of claim 9 wherein the electrode assembly comprises a cathode comprising carbon monofluoride and a hybrid thereof.

19. The implantable medical device of claim 9 wherein the battery is a lithium carbon monofluoride silver vanadium oxide (Li/CFx-SVO) battery.

20. The implantable medical device of claim 9 wherein the organic compound comprises an aromatic hydroxycarboxylate-based compound.

21. The implantable medical device of claim 20 wherein the hydroxycarboxylate-based compound is selected from the group consisting of lithium salicylate, ethyl salicylate, a hydroxyphthalic anhydride, a hydroxyphthalic acid, a hydroxyphthalic amide, a hydroxybenzoic acid, a hydroxybenzamide, salicylate ester, salicylamide, and salicylanilide.

22. The additive of claim 21 wherein the compound is selected from a group consisting of lithium salicylate, a hydroxyphthalic anhydride, a hydroxybenzoic acid, salicylate ester, salicylamide, and salicylanilide.

23. The implantable medical device of claim 9 wherein the organic compound has the following structure:

24. The implantable medical device of claim 23 wherein A is H.

25. The implantable medical device of claim 23 wherein A is M.

26. The implantable medical device of claim 9 wherein the performance enhancing additive comprises a mixture of different organic compounds comprising hydroxy and carboxy groups.

27. The implantable medical device of claim 26 wherein the performance enhancing additive comprises a first organic additive being at least one of lithium salicylate, a hydroxyphthalic anhydride, a hydroxybenzoic acid, salicylate ester, salicylamide, and salicylanilide.

28. The implantable medical device of claim 27 wherein the performance enhancing additive comprises a second organic additive being at least one of lithium salicylate, a hydroxyphthalic anhydride, a hydroxybenzoic acid, salicylate ester, salicylamide, and salicylanilide.

29. The implantable medical device of claim 28 wherein the performance enhancing additive comprises a third organic additive combined with the first and the second organic additives, the third organic additive being at least one of lithium salicylate, a hydroxyphthalic anhydride, a hydroxybenzoic acid, salicylate ester, salicylamide, and salicylanilide.

30. An implantable medical device comprising a battery comprising:

an electrode assembly comprising;

an anode comprising an element selected from the group of a Group IA element and a Group IIA element; and

a cathode comprising a metal oxide;

a liquid electrolyte comprising a performance enhancing additive, wherein the performance enhancing additive comprises at least one organic compound comprising hydroxy and carboxy groups.

31. An implantable medical device comprising a lithium carbon monofluoride silver vanadium oxide (Li/CFx-SVO) battery comprising a liquid electrolyte comprising a performance enhancing additive, wherein the performance enhancing additive comprises at least one aromatic hydroxycarboxylate-based compound.