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 8,785,039 B2
• Filed: 07/01/2009
• Issued: 07/22/2014
• 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: Uchida, Yozo, Teranishi, Tadashi
• Primary Examiner(s): Gilliam, Barbara
• Assistant Examiner(s): MARTIN, ANGELA J
• Application Number:
  US13/002,665
• Publication Number:
  US 20110111290A1
• Time in Patent Office: 1,847 Days
• Field of Search: None
• 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 positive electrode plate comprising:

a battery-dedicated electrode foil which comprises

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 on a surface of the aluminum electrode foil, and being in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, the corrosion-resistant layer being made of a carbide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, wherein a thickness of the corrosion-resistant layer is 3 nm to 90 nm; 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.

2. The positive electrode plate 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 positive electrode plate according to claim 1, wherein

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

4. The positive electrode plate according to claim 1, wherein

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

5. The positive electrode plate 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.

6. The positive electrode plate according to claim 1, 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.

7. A battery comprising:

a power generation element that includes the positive electrode plate according to claim 1.

8. The battery according to claim 7, 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.

9. The battery according to claim 8, wherein

the electrolyte solution contains LiCIO₄.

10. A vehicle equipped with the battery according to claim 7.

11. A battery-equipped appliance that is equipped with the battery according to claim 7.

12. 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 comprises

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 on a surface of the aluminum electrode foil, and being in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, the corrosion-resistant layer being made of a carbide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, wherein a thickness of the corrosion-resistant layer is 3 nm to 90 nm, 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

a 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.