BATTERY-DEDICATED ELECTRODE FOIL, POSITIVE ELECTRODE PLATE, BATTERY, VEHICLE, AND BATTERY-EQUIPPED APPLIANCE, AND MANUFACTURE METHOD FOR THE BATTERY-DEDICATED ELECTRODE FOIL, AND MANUFACTURE METHOD OF THE POSITIVE ELECTRODE PLATE

• US 20110111290A1
• Filed: 07/01/2009
• Published: 05/12/2011
• Est. Priority Date: 07/11/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Teranishi, Tadashi, Uchida, Yozo
• Granted Patent: US 8,785,039 B2
• Time in Patent Office: Days
• US Class Current: 429/207
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0568 characterised by the solutes
• CPC Class Codes: H01M 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/1391 of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/663 containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
• CPC Class Codes: H01M 4/664 Ceramic materials
• CPC Class Codes: H01M 4/667 in the form of layers, e.g. coatings
• 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
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A battery-dedicated electrode foil (32) includes an aluminum electrode foil (33) in which metal aluminum is exposed, and corrosion-resistant layers (34A, 34B) that are formed on surfaces (33a, 33b) of the aluminum electrode foil, and that are in direct contact with the metal aluminum that forms the aluminum electrode foil, and that is made of tungsten carbide.

Claims

1. A battery-dedicated electrode foil comprising:

an aluminum electrode foil in which metal aluminum is exposed, or which has on metal aluminum an aluminum oxide layer of 3 nm or less in film thickness; and

a corrosion-resistant layer that is formed on a surface of the aluminum electrode foil, and that is in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, and that is made of a carbide or an oxide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium.

2. The battery-dedicated electrode foil according to claim 1, wherein

the corrosion-resistant layer is in direct contact with the metal aluminum that forms the aluminum electrode foil.

3. The battery-dedicated electrode foil according to claim 1, wherein

the corrosion-resistant layer is made of a carbide of the at least any one substance.

4. The battery-dedicated electrode foil according to claim 1, wherein

the corrosion-resistant layer is made of a carbide or an oxide of tungsten.

5. The battery-dedicated electrode foil according to claim 1, wherein

a thickness of the corrosion-resistant layer is 3 nm to 90 nm.

6. The battery-dedicated electrode foil according to claim 1, wherein

a diamond-like carbon coating of 0.5 nm to 50 nm in thickness is provided on the corrosion-resistant layer.

7. A positive electrode plate comprising:

the battery-dedicated electrode foil according claim 1, and

a positive electrode active material layer that contains a positive electrode active material and that is supported on a main surface of the battery-dedicated electrode foil.

8. The positive electrode plate according to claim 7, wherein

the positive electrode active material contains a Li compound, and the positive electrode active material layer is formed by applying a water-based active material paste whose solvent is water.

9. A battery comprising:

a power generation element that includes the positive electrode plate according to claim 7.

10. The battery according to claim 9, comprising

an electrolyte solution that contains an Li ion,

wherein the positive electrode active material layer contains the positive electrode active material that includes a Li compound.

11. The battery according to claim 10, wherein

the electrolyte solution contains LiClO₄.

12. A vehicle equipped with the battery according to claim 9.

13. A battery-equipped appliance that is equipped with the battery according to claim 9.

21. A manufacture method for a positive electrode plate that includes a battery-dedicated electrode foil, and a positive electrode active material layer that is supported on a main surface of the battery-dedicated electrode foil, and that contains a positive electrode active material, wherein

the battery-dedicated electrode foil is the battery-dedicated electrode foil according to claim 1, and

the positive electrode active material layer contains the positive electrode active material that includes a Li compound, and

the positive electrode active material that includes the Li compound is contained in the main surface of the battery-dedicated electrode foil,

the manufacture method comprising

the positive electrode active material layer formation step of forming the positive electrode active material layer by applying and drying a water-based active material paste whose solvent is water.

14. A battery-dedicated electrode foil manufacture method comprising:

the step of preparing an aluminum electrode foil in which metal aluminum is exposed, or which has on metal aluminum an aluminum oxide layer of 3 nm or less in film thickness; and

the corrosion-resistant layer formation step of forming a corrosion-resistant layer made of a carbide or an oxide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, on the metal aluminum that forms the aluminum electrode foil, or on the aluminum oxide layer.

15. The manufacture method according to claim 14, wherein

the corrosion-resistant layer formation step forms the corrosion-resistant layer directly on the metal aluminum of the aluminum electrode foil in which the metal aluminum is exposed on a surface.

16. The manufacture method according to claim 14, wherein

the carbide of the at least one substance is formed as the corrosion-resistant layer.

17. The manufacture method according to claim 14, wherein

the carbide or the oxide of tungsten is formed as the corrosion-resistant layer.

18. The manufacture method according to claim 14, comprising

the removal step of forming the aluminum electrode foil by removing at least a portion of the aluminum oxide layer of an aluminum foil that has on a surface an aluminum oxide layer, in a thickness direction of the aluminum foil, prior to the corrosion-resistant layer formation step.

19. The manufacture method according to claim 18, wherein

the removal step is performed by physical etching through a use of an ion of an inert gas.

20. The manufacture method according to claim 18, wherein

the removal step and the corrosion-resistant layer formation step are continuously performed in a low-oxygen atmosphere in which the metal aluminum substantially does not oxidize.