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Conductive corrosion-resistant metal bipolar plate for fuel cell, and preparation method thereof

A metal bipolar plate and corrosion-resistant metal technology, which is applied to fuel cell parts, fuel cells, circuits, etc., can solve the problems of incompatibility between corrosion resistance and electrical conductivity, poor electrical conductivity of oxides, etc., and achieve compactness Good performance, low porosity, simple and stable process

Active Publication Date: 2020-07-31
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metals with good corrosion resistance are generally due to the formation of dense oxide films on the surface, and oxides often have poor electrical conductivity. Therefore, ordinary metal bipolar plates have a contradiction between corrosion resistance and electrical conductivity.

Method used

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  • Conductive corrosion-resistant metal bipolar plate for fuel cell, and preparation method thereof
  • Conductive corrosion-resistant metal bipolar plate for fuel cell, and preparation method thereof
  • Conductive corrosion-resistant metal bipolar plate for fuel cell, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] see figure 1 A conductive and corrosion-resistant metal bipolar plate used for fuel cells is a metal bipolar plate with a surface carburized layer, and the carburized layer is a carburized layer with TiC as the main phase formed on the surface of the metal bipolar plate substrate. The material of the metal bipolar plate substrate is preferably pure titanium, and its thickness is 0.3 mm. The thickness of the carburized layer is 10 μm. The preparation method comprises the following steps:

[0025] (1) Pretreatment of the metal bipolar plate: firstly use sandpaper to polish the surface of the metal bipolar plate, then use a polishing machine to polish, then rinse with distilled water, and then immerse the metal bipolar plate in ethanol and acetone solutions for ultrasonic cleaning 30min, and then dried to obtain a clean metal bipolar plate.

[0026] (2) Put the clean metal bipolar plate after the pretreatment of the step (1) into the vacuum chamber of the glow plasma, v...

Embodiment 2

[0030] see figure 1 A conductive and corrosion-resistant metal bipolar plate used for fuel cells is a metal bipolar plate with a surface carburized layer, and the carburized layer is a carburized layer with TiC as the main phase formed on the surface of the metal bipolar plate substrate. The material of the metal bipolar plate substrate is preferably pure titanium, and its thickness is 0.1 mm. The thickness of the carburized layer is 1 μm. The preparation method comprises the following steps:

[0031] (1) Pretreatment of the metal bipolar plate: firstly use sandpaper to polish the surface of the metal bipolar plate, then use a polishing machine to polish, then rinse with distilled water, and then immerse the metal bipolar plate in ethanol and acetone solutions for ultrasonic cleaning 30min, and then dried to obtain a clean metal bipolar plate.

[0032] (2) Put the clean metal bipolar plate after the pretreatment of the step (1) into the vacuum chamber of the glow plasma, va...

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Abstract

The invention discloses a conductive corrosion-resistant metal bipolar plate for a fuel cell, and a preparation method thereof, wherein the metal bipolar plate comprises a metal titanium matrix and aconductive corrosion-resistant carburized layer, the metal matrix is pure titanium, and the surface layer is a conductive corrosion-resistant layer formed by a carburized layer taking TiC as a main phase. According to the preparation method, high-purity graphite is used as a carbon source, activated carbon particles are sputtered out under the action of ion bombardment, adsorbed to the surface ofa titanium substrate and diffused inwards, and a conductive corrosion-resistant carburized layer is formed at a time. The process is simple, the cost is low, and the conductive corrosion-resistant effect is good.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a conductive and corrosion-resistant metal bipolar plate for fuel cells and a preparation method. Background technique [0002] The bipolar plate is an important part of the fuel cell. Its working principle is that hydrogen and oxygen are passed into both sides of the proton exchange membrane with catalysts on both sides to form a potential difference. When the external circuit is connected, the electrode (catalyst) Reactions of gaining and losing electrons (oxidation-reduction reactions) occur respectively, thereby generating an electric current that can be utilized. [0003] Bipolar plates play many roles in fuel cells, so higher requirements are put forward for the performance of bipolar plates: high electrical conductivity, small contact resistance, good conductor of heat, good flow channel design, Good gas barrier properties, while requiring good corrosion resistance and...

Claims

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Application Information

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IPC IPC(8): H01M8/0204H01M8/0228H01M8/0258H01M8/00
CPCH01M8/0258H01M8/0204H01M8/0228H01M8/00Y02E60/50Y02P70/50
Inventor 秦林吴玉程剌玲敏王振霞林乃明田林海
Owner TAIYUAN UNIV OF TECH
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