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Corrosion-resistant aluminum conductive material and process for producing the same

A conductive material and manufacturing method technology, applied in metal material coating process, electrolytic capacitor, hybrid capacitor electrode, etc., to achieve the effect of excellent corrosion resistance

Inactive Publication Date: 2006-11-08
NIPPON LIGHT METAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the case of any of these electrodes, in order to manufacture an electrode material without defects such as pinholes and cracks, it is necessary to form a thick conductive film on the surface of a conductive substrate or a current collector. For long-term durability (long life), you have to sacrifice weight reduction and cost reduction. On the contrary, if you focus on weight reduction and cost reduction, you have to sacrifice long-term durability (long life) and so on. Satisfies long-term durability (long life), weight reduction and cost reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Aluminum plate (JIS H 4000; A5052) with a thickness of 0.5 mm is degreased, followed by zincate treatment, and electroplating nickel treatment (Ni electroplating treatment) to form a nickel-plated film with a thickness of 2 μm on the surface, followed by electroplating gold (Au plating treatment), a gold-plated film with a thickness of 1 μm was formed.

[0037] Next, the obtained plated aluminum plate was kept in hot water (pH: 5.5, phosphate ion concentration (P): 2 ppm, silicate ion concentration (Si) 1 ppm) at 100°C for 30 minutes to perform hot water treatment. , extracted from hot water and dried to produce the corrosion-resistant aluminum plate (corrosion-resistant aluminum conductive material) of Example 1.

[0038] Cut out a test piece with a length of 50 mm × a width of 50 mm from the corrosion-resistant aluminum plate obtained in Example 1, make the scanning potential 0 to 1000 mV vs.Ag / AgCl, and polarize the potential of the test piece with respect to the sil...

Embodiment 2

[0043] In 1 L of 1-methyl-2-pyrrolidone containing 10 g of carbon black with an average particle diameter of 0.5 μm and 2 g of polyvinylidene fluoride, an aluminum plate degreased in the same manner as in Example 1 was arranged as an anode, and a carbon electrode was also arranged as an anode. For the cathode, a voltage of 10 V was applied between these electrodes for 1 minute to perform carbon electrophoresis, and a carbon film with a thickness of 1 μm was formed on the surface of the aluminum plate.

[0044] Next, the obtained aluminum plate after the carbon electrophoresis treatment was held in steam at 120° C. for 30 minutes to perform steam treatment, and the corrosion-resistant aluminum plate (corrosion-resistant aluminum conductive material) of Example 2 was produced.

[0045] About the obtained anti-corrosion aluminum plate of Example 2, it carried out similarly to the said Example 1, the corrosion resistance evaluation test, the electrical conductivity evaluation test,...

Embodiment 3

[0048] Carbon black with an average particle diameter of 0.5 μm and polyvinylidene fluoride were mixed with 1-methyl-2-pyrrolidone at a ratio of 1:1 to prepare a coating liquid, and the coating liquid was applied on the same surface as in Example 1 above. The surface of the aluminum plate degreased in the same manner was subjected to carbon coating treatment, followed by drying at 200° C. for 2 minutes to form a carbon-containing film with a thickness of 1 μm on the surface of the aluminum plate.

[0049] Next, the obtained carbon-coated aluminum plate was kept in steam at 120° C. for 30 minutes to perform a steam treatment, and the corrosion-resistant aluminum plate (corrosion-resistant aluminum conductive material) of Example 3 was produced.

[0050] About the obtained anti-corrosion aluminum plate of Example 3, it carried out similarly to said Example 1, the corrosion resistance evaluation test, the electrical conductivity evaluation test, and comprehensive evaluation were p...

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Abstract

A corrosion-resistant aluminum conductive material comprises a material of aluminum or aluminum alloy and, superimposed on a surface thereof, a conductive coating, wherein any flaws of the conductive coating are substantially sealed up by hot water treatment or steam treatment. There is further provided a process for producing a corrosion-resistant aluminum conductive material, comprising forming a conductive coating on a surface of aluminum material and subjecting the same to hot water treatment or steam treatment so that any flaws of the conductive coating are substantially sealed up. Thus, without detriment to the excellent properties of aluminum material, flaws unavoidably occurring in the conductive coating formed on the surface of the aluminum material can be substantially sealed up. Even when the thickness of the conductive coating is small, excellent corrosion resistance can be imparted to the aluminum material.

Description

technical field [0001] The present invention relates to an aluminum conductive material formed by forming a conductive film on the surface of an aluminum material made of aluminum or an aluminum alloy, and a method for producing the same, and relates to, for example, an electrode of a lithium ion secondary battery, an electrode of an aluminum electrolytic capacitor, and a beverage Chlorine sterilization of water by direct electrolysis, electrodes for water electrolysis used in the production of alkaline ionized water, acidic water, etc., electrolytic treatment (anodized coating treatment, electrolytic coloring treatment) in the production process of aluminum building materials, etc. , electrophoretic coating treatment, etc.), which are useful for many electrode materials such as electrodes used in corrosion resistance, and a corrosion-resistant aluminum conductive material and a production method thereof. Background technique [0002] For example, as an electrode used in ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C4/18C23C8/02C23C8/16
CPCC23C4/18C23C8/02C23C8/16H01G11/22Y02E60/13
Inventor 岛田英树田口喜弘海老原健
Owner NIPPON LIGHT METAL CO LTD