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

A metal bipolar plate and fuel cell technology, which is applied to fuel cell parts, fuel cells, metal material coating technology, etc., can solve the problems of poor electrical conductivity of oxides, incompatibility of corrosion resistance and electrical conductivity, etc. , to achieve the effect of increasing the diffusion

Pending Publication Date: 2020-06-26
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 titanium metal bipolar plate for fuel cell and preparation method
  • Conductive corrosion-resistant titanium metal bipolar plate for fuel cell and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] see figure 1 , a metal bipolar plate made of conductive and corrosion-resistant titanium for fuel cells is a metal bipolar plate with a surface infiltrated layer, and the infiltrated layer is formed on the surface of the metal bipolar plate substrate with TiC and TiN as the main phase Carbonitriding layer. The material of the metal bipolar plate substrate is preferably pure titanium, and its thickness is 0.3 mm. The carbonitriding layer thickness is 5 μm. The preparation method comprises the following steps:

[0026] (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.

[0027] (2) Put the clean metal bipolar plate after the pretreatment of the step (1) into the vacuum chambe...

Embodiment 2

[0031] see figure 1 , a metal bipolar plate made of conductive and corrosion-resistant titanium for fuel cells is a metal bipolar plate with a surface infiltrated layer, and the infiltrated layer is formed on the surface of the metal bipolar plate substrate with TiC and TiN as the main phase Carbonitriding layer. The material of the metal bipolar plate substrate is preferably pure titanium, and its thickness is 0.1 mm. The carbonitriding layer thickness is 0.5 μm. The preparation method comprises the following steps:

[0032] (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.

[0033] (2) Put the clean metal bipolar plate after the pretreatment of the step (1) into the vacuum cham...

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Abstract

The invention discloses a conductive corrosion-resistant titanium metal bipolar plate for a fuel cell and a preparation method. The metal bipolar plate comprises a metal titanium matrix and a conductive corrosion-resistant carburized layer, wherein the metal matrix is pure titanium, and the surface layer is a conductive corrosion-resistant layer formed by a carbonitriding layer taking TiC and TiNas main phases. 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 thesurface of a titanium substrate and diffused inwards, nitrogen is introduced in due time, and a conductive corrosion-resistant carburized layer is formed at a time; the process is simple, the cost islow, 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 titanium metal bipolar plate for fuel cells and a preparation method thereof. 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 corrosi...

Claims

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Application Information

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IPC IPC(8): H01M8/0206H01M8/0228C23C8/30C23C8/02
CPCH01M8/0206H01M8/0228C23C8/30C23C8/02Y02E60/50
Inventor 秦林吴玉程张莹武晶晶王振霞田林海林乃明
Owner TAIYUAN UNIV OF TECH
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