Lithium-ion battery

• US 9,077,022 B2
• Filed: 12/06/2010
• Issued: 07/07/2015
• Est. Priority Date: 10/29/2004
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Howard, William G., Schmidt, Craig L., Scott, Erik R.
• Primary Examiner(s): WEINER, LAURA S
• Application Number:
  US12/961,319
• Publication Number:
  US 20110133699A1
• Time in Patent Office: 1,674 Days
• Field of Search: 429/231.1, 429/231.3, 429/231.5, 429/232, 429/233, 429/245, 429/338, 429/217
• US Class Current: 1/1
• CPC Class Codes: A61N 1/378 Electrical supply
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0568 characterised by the solutes
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• 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 4/587 for inserting or intercalating light metals
• CPC Class Codes: H01M 4/623 fluorinated polymers
• CPC Class Codes: H01M 4/625 Carbon or graphite
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A lithium-ion battery includes a positive electrode, a negative electrode, and a battery case. The positive electrode includes a positive current collector, a first material of the form Li_1−xMO₂, where M is a metal, and a second material including carbon. The negative electrode includes a negative current collector, a third material including a lithium titanate material, and a fourth material including carbon. The battery case includes titanium and at least partially surrounds the positive and negative electrodes.

Claims

1. A lithium-ion battery comprising:

a positive electrode comprising;

a positive current collector;

a first material comprising LiCoO₂, LiNiO₂, or LiMnO₂, the first material being an active material; and

a second material comprising carbon, the second material being conductive; and

a negative electrode comprising;

a negative current collector;

a third material comprising a lithium titanate material, the third material being another active material; and

a fourth material comprising carbon, the fourth material being conductive;

a liquid electrolyte; and

a battery case comprising titanium, at least partially surrounding the positive and negative electrodes;

wherein the positive electrode and the negative electrode are wound electrodes; and

wherein a charging and discharging capacity of the positive electrode at a zero voltage crossing potential is below a corrosion potential of the negative current collector and above a decomposition potential of the first material.

2. The lithium-ion battery of claim 1, wherein the first material comprises LiCoO₂.

3. The lithium-ion battery of claim 1, wherein the first material comprises LiNiO₂.

4. The lithium-ion battery of claim 1, wherein the first material comprises LiMnO₂.

5. The lithium-ion battery of claim 1, wherein the positive and negative current collectors comprise a thin foil comprising aluminum.

6. The lithium-ion battery of claim 5, wherein the first material comprises LiCoO₂.

7. The lithium-ion battery of claim 6, wherein the fourth material comprises carbon black.

8. The lithium-ion battery of claim 7, further comprising:

an electrolyte comprising lithium hexafluorophosphate and ethylene carbonate.

9. The lithium-ion battery of claim 8, wherein the positive and negative electrodes further comprise a binder comprising polyvinylidene fluoride.

10. The lithium-ion battery of claim 5, wherein the first material comprises LiNiO₂.

11. The lithium-ion battery of claim 5, wherein the first material comprises LiMnO₂.