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Fuel cell separator material, fuel cell separator and fuel cell stack using same, and method for manufacturing fuel cell separator material

A technology for fuel cells and separators, applied to fuel cell parts, fuel cells, circuits, etc., can solve problems such as characteristic degradation, and achieve the effect of ensuring adhesion

Active Publication Date: 2016-02-10
JX NIPPON MINING & METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This chlorine is sucked into the fuel cell, and depending on the metal used in the separator material, the characteristics may be greatly deteriorated by the chlorine

Method used

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  • Fuel cell separator material, fuel cell separator and fuel cell stack using same, and method for manufacturing fuel cell separator material
  • Fuel cell separator material, fuel cell separator and fuel cell stack using same, and method for manufacturing fuel cell separator material
  • Fuel cell separator material, fuel cell separator and fuel cell stack using same, and method for manufacturing fuel cell separator material

Examples

Experimental program
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Embodiment

[0131]

[0132] As the Ti base material, an industrial pure titanium material (JIS 1 type) with a thickness of 100 μm was used, and pretreatment was performed by FIB (Focused Ion Beam Processing). As a result of energy dispersive fluorescent X-ray analysis (EDX) observation by FE-TEM (electrolytic emission transmission electron microscope), it was confirmed that a titanium oxide layer of about 10 nm was previously formed on the surface of the Ti substrate.

[0133] Also, in some examples, a material obtained by coating a 100 μm-thick industrial pure stainless steel material (SUS316L) or a 100-μm-thick pure copper (C1100) with Ti at a predetermined thickness shown in Table 1 (Ti coating material ). Coating of Ti was performed by vacuum vapor deposition using an electron beam vapor deposition apparatus (manufactured by ULVAC, MB05-1006).

[0134] Next, on the surface of the titanium oxide layer of the Ti substrate, a Cr film was formed so as to have a predetermined target thi...

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Abstract

A material for fuel cell separator, wherein a surface layer 6 containing Au and Cr is formed on a surface of a Ti base 2, and an intermediate layer 2a containing Ti, O, Cr, and less than 20 atomic % of Au is present between the Ti base and the surface layer, a thickness of an area containing 65 atomic % or more of Au being 1.5 nm or more, a maximum concentration of Au being 80 atomic % or more, a coating amount of Au being 9000 to 40000 ng / cm2, a ratio represented by (Au coating amount) / (Cr coating amount) being 10 or more, a coating amount of Cr being 200 ng / cm2 or more, and in the intermediate layer having an area containing 10% or more of Ti, 10% or more of O and 20% or more of Cr being 1 nm or more.

Description

technical field [0001] The present invention relates to a fuel cell separator material in which Au or an Au alloy (Au-containing layer) is formed on the surface, a fuel cell separator and a fuel cell stack using the same. Background technique [0002] As a solid polymer separator for a fuel cell, a member in which a gas flow channel is formed on a carbon plate has conventionally been used, but there is a problem that the material cost and the processing cost are large. On the other hand, in the case of using a metal plate instead of a carbon plate, there is a problem of corrosion or elution due to exposure to an oxidative atmosphere at a high temperature. Therefore, a technique is known in which an alloy of a noble metal selected from Au, Ru, Rh, Pd, Os, Ir, and Pt, and Au is sputtered on the surface of a Ti plate to form a conductive portion (Patent Document 1). Furthermore, Patent Document 1 describes the case where an oxide of the above-mentioned noble metal is formed on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0208H01M8/0228
CPCH01M8/0208H01M8/0228Y02E60/50
Inventor 涉谷义孝
Owner JX NIPPON MINING & METALS CORP