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Highly corrosion-resistant porous metal member

A technology of metal porous bodies and alloys, which is applied in electrode carriers/current collectors, electrolytic capacitors, electrical components, etc., can solve the problems of low strength of stainless steel porous bodies, expensive stainless steel powder, and impractical use, and achieve excellent electrolyte resistance. Effect

Active Publication Date: 2011-11-23
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However stainless steel powder is very expensive
In addition, there is also a problem that the organic resin porous body to which the stainless steel powder is applied is incinerated and the obtained stainless steel porous body has low strength and cannot be practically used.

Method used

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  • Highly corrosion-resistant porous metal member

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A polyurethane sheet (polyurethane foam) having a thickness of 1.5 mm was used as the porous resin sheet. The surface of the chip was treated by immersing the chip in a mixture of 400 g / L chromium trioxide and 400 g / L sulfuric acid at 60° C. for 1 minute. As a result of the surface treatment, the flakes have an anchoring effect on the conductive coating to be formed, thereby achieving strong adhesion of the flakes to the conductive coating.

[0056] Carbon powder having a particle diameter of 0.01 to 20 μm was dispersed in 80 g of a 10% styrene acrylic synthetic resin aqueous solution to prepare a carbon coating solution.

[0057] The polyurethane sheet is then continuously immersed in the coating solution, squeezed with a roller and then dried to make the polyurethane sheet conductive.

[0058] The polyurethane flakes are then electroplated with nickel-tungsten. The polyurethane portion on the resulting part was removed by heat treatment. Thus a composition with 65%...

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Abstract

A porous metal member composed of an alloy at least containing nickel and tungsten is provided. The alloy may contain 50 to 80 wt % of nickel and 20 to 50 wt % of tungsten and may further contain 10 wt % or less of phosphorus and / or 10 wt % or less of boron. Such a porous metal member can be produced by, for example, making a porous base such as a urethane foam be electrically conductive, forming an alloy film containing nickel and tungsten, then removing the porous base from the alloy film, and subsequently reducing the alloy.

Description

technical field [0001] The present invention relates to a metal porous body for a current collector used in a battery such as a lithium ion battery, a capacitor, or a fuel cell. Background technique [0002] Generally, a metal foil such as aluminum foil is used as a current collector (support) in a lithium ion battery, on which a positive electrode material and a negative electrode material are attached. However, metal foils with a two-dimensional structure are inferior to porous bodies in terms of carrying and packing density of active materials. In particular, metal foils cannot retain active materials when they contain them. Thus, the metal foil cannot inhibit the expansion or contraction of the active material, so the amount of active material that remains on the metal foil is limited, so that the current collector can only actually function for a period of time. In addition, the distance between the current collector and the active material is long, and the active mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01M4/86H01G9/048C22C1/08C22C19/03C22C27/04H01G11/66H01G11/68H01M4/66H01M8/02
CPCH01M4/808H01G9/008H01M10/052H01M4/661Y02E60/12Y10T428/12944Y10T428/12479Y02E60/10
Inventor 奥野一树加藤真博粟津知之真岛正利齐藤英敏白石敬司土田齐西村淳一
Owner SUMITOMO ELECTRIC IND LTD
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