Positive electrode plate for use in lithium ion secondary battery, lithium ion secondary battery, vehicle, device with battery mounted thereon, and method for producing positive electrode plate for lithium ion secondary battery

• US 9,105,931 B2
• Filed: 01/08/2010
• Issued: 08/11/2015
• Est. Priority Date: 01/08/2010
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Sato, Takayasu, Imamura, Yuichiro, Matsushita, Yuki
• Primary Examiner(s): Ryan, Patrick
• Assistant Examiner(s): Zhang, Haixia
• Application Number:
  US13/520,241
• Publication Number:
  US 20130122359A1
• Time in Patent Office: 2,041 Days
• Field of Search: None
• US Class Current: 1/1
• 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 10/0561 the electrolyte being constituted of inorganic materials only
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• 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 4/661 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 4/667 in the form of layers, e.g. coatings
• CPC Class Codes: H01M 4/80 Porous plates, e.g. sintered carriers
• 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

Abstract

A positive electrode plate for a lithium ion secondary battery is made of aluminum and includes a positive current collecting foil made of aluminum, in which at least a main surface portion constituting a main surface is porous, a positive active material layer formed on the main surface portion of the positive current collecting foil, and a coating layer, having electrical conductivity and corrosion resistance, formed between the positive current collecting foil and the positive active material layer to directly coat the main surface of the positive current collecting foil.

Claims

1. A positive electrode plate for a lithium ion secondary battery, the positive electrode plate comprising:

a positive current collecting foil made of aluminum, in which at east a main surface portion constituting a main surface is porous; and

a positive active material layer containing positive active material particles and being formed on the main surface portion of the positive current collecting foil,

wherein a coating layer consisting of tungsten carbide, having electrical conductivity and corrosion resistance, is formed between the positive current collecting foil from which an aluminum oxide layer made of aluminum oxide having been formed on the main surface is removed and the positive active material layer to directly coat the main surface of the positive current collecting foil without interposition of an aluminum oxide layer made of aluminum oxide, and

wherein a diamond-like carbon film is directly formed on the coating layer.

2. A lithium ion secondary battery comprising:

a power generating element including the positive electrode plate for a lithium ion secondary battery according to claim 1; and

an electrolyte including lithium ions.

3. The lithium on secondary battery according to claim 2, wherein the positive active material layer has a thickness of 35 to 75 μ

m.

4. A vehicle equipped with the lithium ion secondary battery according to claim 2, the vehicle being configured to use electric energy stored in the lithium ion secondary battery as the whole of or part of a driving power source.

5. A vehicle equipped with the lithium on secondary battery according to claim 3, the vehicle being configured to use electric energy stored in the lithium ion secondary battery as the whole of or part of a driving power source.

6. A battery-mounting device equipped with the lithium ion secondary battery according to claim 2, the battery-mounting device being configured to use electric energy stored in the lithium ion secondary battery as the whole of or part of a driving energy source.

7. A battery-mounting device equipped with the lithium on secondary battery according to claim 3, the battery-mounting device being configured to use electric energy stored in the lithium on secondary battery as the whole of or part of a driving energy source.

8. A method of manufacturing a positive electrode plate for a lithium ion secondary battery, the positive electrode plate comprising:

a positive current collecting foil made of aluminum, in which at least a main surface portion constituting a main surface is porous;

a positive active material layer containing positive active material particles and being formed on the main surface portion of the positive current collecting foil; and

a coating layer consisting of tungsten carbide, having electrical conductivity and corrosion resistance, being formed between the positive current collecting foil and the positive active material layer to directly coat the main surface of the positive current collecting foil without interposition of an aluminum oxide layer made of aluminum oxide,

the method comprising the steps of directly coating the main surface of the positive current collecting foil from which an aluminum oxide layer having been formed on the main surface is removed with the coating layer, and directly forming a diamond-like carbon film on the coating layer.