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Titanium material, separator, cell, and fuel cell

A fuel cell and separator technology, applied in fuel cells, fuel cell parts, metal material coating processes, etc., can solve problems such as rising costs and expensive precious metals, and achieve high power generation efficiency, not easy to surface oxidation, and low cost. The effect of contact resistance

Inactive Publication Date: 2020-10-02
NIPPON STEEL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, precious metals are expensive, and the cost of titanium materials increases due to the use of precious metals

Method used

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  • Titanium material, separator, cell, and fuel cell
  • Titanium material, separator, cell, and fuel cell
  • Titanium material, separator, cell, and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] In order to confirm the effects of the present invention, various titanium materials were fabricated and evaluated.

[0125] 1. Base material preparation and cold rolling process

[0126] As the base material, the base material A and the base material B described below were prepared. The base material A was formed by cold-rolling JIS Class 1 titanium into a plate shape with a thickness of 0.1 mm. A rolling lubricant containing amine is applied to the surface of titanium to perform cold rolling. The rolling lubricant was used by adding 1% of a lubricating additive for preventing oxidation manufactured by Kaneda Co., Ltd. The lubricant additive contains dialkyldiphenylamine.

[0127] For substrate A, no annealing was performed. Substrate B was obtained by degreasing substrate A with alkali, and then performing bright annealing (BA, Bright Annealing) in a continuous furnace at 720° C. for 30 seconds in an Ar atmosphere. The Ar atmosphere is obtained by flowing industr...

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Abstract

This titanium material comprises: a base made of pure titanium or a titanium alloy; and a carbon layer that covers the surface of the base. The carbon layer contains non-graphitizing carbon, and also,in Raman spectroscopy using an argon laser of wavelength 532 nm, the R value (I1350 / I1590) is 2.0-3.5 [inclusive]. However, I1350 is the peak intensity in the vicinity of wavelength 1.35 * 105m-1 inthe Raman spectrum, and I1590 is the peak intensity in the vicinity of wavelength 1.59 * 105m-1 in the Raman spectrum. With this titanium material, it is possible to realize low contact resistance using a carbon layer. Also, this titanium material is not susceptible to surface oxidation progressing even if exposed to a noble potential, and it is possible to maintain low contact resistance.

Description

technical field [0001] The present invention relates to a titanium material, a fuel cell separator using the titanium material, a battery cell using the separator, and a fuel cell using the battery cell. Background technique [0002] Uses of metallic materials having excellent electrical conductivity include current collectors of batteries, battery cases, and the like. In fuel cell applications, such metal materials are used as metal collector separator materials. In an environment where corrosion may occur, stainless steel or titanium is used as a metal material excellent in corrosion resistance. The corrosion resistance of stainless steel is due to the formation of Cr on its surface 2 o 3 The main oxide film protects the base material. Similarly, the corrosion resistance of titanium is due to the formation of TiO on its surface 2 The main oxide film protects the base material. [0003] Although these oxide films are useful for improving corrosion resistance, they lac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0206H01M8/0213H01M8/0215H01M8/0228C23C26/00
CPCH01M8/0206H01M8/0213H01M8/0215H01M8/0228Y02E60/50C23C28/04C23C28/042C23C28/046H01M2008/1095C23C28/322C23C28/34
Inventor 上仲秀哉能势幸一西山佳孝今村淳子佐藤悠高岛佑弥
Owner NIPPON STEEL CORP
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