LITHIUM-ION BATTERY WITH ELECTROLYTE ADDITIVE

• US 20100279155A1
• Filed: 04/30/2009
• Published: 11/04/2010
• Est. Priority Date: 04/30/2009
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Jain, Gaurav, Scott, Erik R., Eberman, Kevin W.
• Application Number:
  US12/433,557
• Publication Number:
  US 20100279155A1
• Time in Patent Office: Days
• US Class Current: 429/50
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0567 characterised by the additives
• CPC Class Codes: H01M 10/0568 characterised by the solutes
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• 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 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/124 having a layered structure
• 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

A rechargeable lithium-ion battery includes a positive electrode and a negative electrode that includes a lithium titanate active material. A separator is provided between the positive electrode and the negative electrode. The battery also includes an electrolyte and an electrolyte additive comprising at least one boroxine ring.

Claims

1. A rechargeable lithium-ion battery comprising:

a positive electrode;

a negative electrode comprising a lithium titanate active material;

a separator provided between the positive electrode and the negative electrode;

an electrolyte; and

an electrolyte additive comprising at least one boroxine ring.

2. The rechargeable lithium-ion battery of claim 1, wherein the additive comprises trimethoxyboroxine.

3. The rechargeable lithium-ion battery of claim 2, wherein the lithium titanate active material comprises Li₄Ti₅O₁₂.

4. The rechargeable lithium-ion battery of claim 2, wherein the additive is present in the electrolyte at a level of between approximately 0.3 and 0.9 weight percent.

5. The rechargeable lithium-ion battery of claim 2, wherein the electrolyte comprises LiPF₆.

6. The rechargeable lithium-ion battery of claim 5, wherein the electrolyte comprises a mixture of ethylene carbonate and ethylmethyl carbonate.

7. The rechargeable lithium-ion battery of claim 2, wherein the lithium titanate active material is configured to cycle lithium at a potential of greater than 1.5 volts versus a lithium reference electrode.

8. The rechargeable lithium-ion battery of claim 2, wherein the positive electrode comprises at least one active material selected from the group consisting of LiCoO₂ and LiMn₂O₄.

9. The rechargeable lithium-ion battery of claim 8, wherein the positive electrode comprises LiCoO₂.

10. The rechargeable lithium-ion battery of claim 2, wherein the positive electrode comprises at least one active material selected from the group consisting of LiMn₂O₄, LiNi_1/3Co_1/3Mn_1/3O₂, LiFePO₄, and LiNi_0.8Co_0.15Al_0.05O₂.

11. The rechargeable lithium-ion battery of claim 2, wherein the positive electrode comprises an active material selected from the group consisting of LiCo_xNi₍₁₋

x)O₂ (where x is between approximately 0.05 and 0.8), LiNi_xCo_yMn<sub>(1−

x−

y)</sub>O₂ (where x is between approximately 0.05 and 0.8 and y is between approximately 0.05 and 0.8), LiAl_xCo_yNi<sub>(1−

x−

y)</sub>O₂ (where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3), and LiTi_xCo_yNi<sub>(1−

x−

y)</sub>O₂ (where x is between approximately 0.05 and 0.3 and y is between approximately 0.1 and 0.3).

12. The rechargeable lithium-ion battery of claim 2, wherein the positive electrode comprises at least one active material selected from the group consisting of LiNi_0.5Mn_1.5O₄, LiCoPO₄, LiMnPO₄, LiVPO₄, Li₂MM′

₃O₈, and LiMM′

₄O₄ where M and M′

are transition metals selected from the group consisting of Cr, Mn, Ti, Fe, Co, Ni, V, and Cu.

13. The rechargeable lithium-ion battery of claim 2, further comprising a case comprising stainless steel.

14. The rechargeable lithium-ion battery of claim 2, wherein the positive electrode and the negative electrode are wound electrodes.

15. The rechargeable lithium-ion battery of claim 2, further comprising a case comprising titanium.

16. The rechargeable lithium-ion battery of claim 2, further comprising a case comprising a multi-layered metal and polymer foil.

17. The rechargeable lithium-ion battery of claim 2, wherein the separator comprises a porous polymeric material.

18-26. -26. (canceled)

27. A rechargeable lithium-ion battery comprising:

a positive electrode;

a negative electrode comprising a lithium titanate active material; and

an electrolyte comprising a trimethoxyboroxine additive.

28. The rechargeable lithium-ion battery of claim 27, wherein the lithium titanate material comprises Li₄Ti₅O₁₂.

29. The rechargeable lithium-ion battery of claim 28, wherein the positive electrode comprises an active material selected from the group consisting of LiCoO₂ and LiMn₂O₄.

30. The rechargeable lithium-ion battery of claim 29, wherein the electrolyte further comprises ethylene carbonate, ethylmethyl carbonate, and a salt of LiPF₆.

31. The rechargeable lithium-ion battery of claim 30, wherein the electrolyte comprises between approximately 0.3 and 0.9 weight percent of the trimethoxyboroxine additive.

32. The rechargeable lithium-ion battery of claim 27, wherein the positive electrode and the negative electrode are wound electrodes.

33-40. -40. (canceled)