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Carbon-coated aluminum material, and method for production thereof

A technology of carbon coating and aluminum materials, applied in the direction of electrode manufacturing, chemical instruments and methods, and plating of superimposed layers, can solve the problems of internal resistance increase, surface conductivity decrease, and insulation, etc., to maintain adhesion , increase the amount of production, improve the effect of adhesion

Active Publication Date: 2009-09-30
TOYO ALUMINIUM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventionally, when aluminum materials are directly used as materials for electrodes or current collectors, there is a problem that the oxide film formed on the surface of the aluminum material makes it passivated, and as a result, the electrical conductivity of the surface decreases and insulation occurs.
[0006] However, in these production methods, the adhesiveness between the coated carbon and the aluminum material is still insufficient, the adhesive itself is unstable to heat, and the presence of the adhesive increases the internal resistance.

Method used

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  • Carbon-coated aluminum material, and method for production thereof
  • Carbon-coated aluminum material, and method for production thereof
  • Carbon-coated aluminum material, and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0083] A carbonaceous substance was coated on both sides of an aluminum foil (JIS A-1050) having a thickness of 50 μm and a composition shown in Table 1, and was dried at 100° C. for 10 minutes to attach the carbonaceous substance. The composition of the carbonaceous material was such that 1 part by weight of butanol was added to 1 part by weight of carbon black (#50 manufactured by Mitsubishi Chemical Corporation) with an average particle diameter of 30 nm. In addition, the adhesion of the carbonaceous substance at this time was adjusted so that the thickness after drying was 1 μm per surface. Then, the aluminum foil to which the carbonaceous substance was adhered was kept at a temperature of 550° C. in a methane gas atmosphere for 10 hours to prepare a sample.

[0084] The surface of the obtained sample was observed with a scanning electron microscope (5000 times magnification). The scanning electron microscope photo is as figure 2 shown.

[0085] (existing example 2)

...

Embodiment 1-3、 comparative example 1-3

[0088] Except having used the aluminum foil of the composition shown in Table 1, it carried out similarly to the conventional example 1, and produced the sample.

[0089] The obtained sample surface of Example 2 was observed with a scanning electron microscope (5000 times magnification). The scanning electron microscope photo is as image 3 shown.

[0090] Table 1 shows the adhesion between the carbon-containing layer and the aluminum foil of the carbon-coated aluminum material obtained in Conventional Examples 1-2, Examples 1-3, and Comparative Examples 1-3, the reliability test over time, and the formed aluminum Carbide Al 4 C 3 analysis results. Evaluation conditions are as follows.

[0091] [closeness]

[0092] The adhesiveness was evaluated by the tape method. A rectangular sample with a width of 10 mm and a length of 100 mm was prepared, and an adhesive tape having an adhesive surface of 15 mm in width and 120 mm in length (manufactured by Sumitomo 3M Co., Ltd., t...

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Abstract

Disclosed is a carbon-coated aluminum material in which the adhesion between a carbon-containing layer and an aluminum material can be maintained for a long period. Also disclosed is a method for producing the carbon-coated aluminum material. The carbon-coated aluminum material comprises an aluminum foil (1), a carbon-containing layer (2) and an intermediate layer (3). The intermediate layer (3) has a first surface region (3) which contains a carbide of aluminum and is formed on at least a part of the surface of the aluminum foil (1). The carbon-containing layer (2) has a second surface region (21) which is extended toward the outside of the first surface region (3). The carbon-containing layer (2) further contains a carbon-containing particle (22). The second surface region (21) is formed between the first surface region (3) and the carbon-containing particle (22), and contains a carbide of aluminum. In the aluminum foil (1), the aluminum content is 99.6% by mass or more, the lead content is 10 ppm by mass or less, and the magnesium content is 10 ppm by mass or less.

Description

technical field [0001] Generally, the present invention relates to a carbon-coated aluminum material formed by coating the surface of an aluminum material with carbon and a method for manufacturing the same. Specifically, the present invention relates to a carbon-coated aluminum material used for electrodes and current collectors of various capacitors, current collectors and electrodes of various batteries, and a method for producing the same. Background technique [0002] Conventionally, when an aluminum material is directly used as a material for an electrode or a current collector, there is a problem that an oxide film formed on the surface of the aluminum material makes it passivated, and as a result, the conductivity of the surface decreases and insulation occurs. In order to solve this problem, a method of improving surface conductivity by coating carbon on the surface of aluminum materials has been adopted. [0003] For example, as a method of providing carbon on the...

Claims

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Application Information

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IPC IPC(8): C23C8/64C23C24/08B32B9/00H01G9/016B32B15/04H01M4/66C22C21/00H01G11/24H01G11/26H01G11/30
CPCH01M4/667C23C28/04H01M4/133H01G11/26H01G11/24H01G9/045H01G9/055C23C26/00Y02E60/122H01M4/583C23C8/64H01M4/661H01G11/30C22C21/00H01G9/058H01M4/04Y02E60/10B32B9/00B32B15/04
Inventor 井上英俊中山邦彦足高善也
Owner TOYO ALUMINIUM KK
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