Metal bipolar plate for fuel cell and preparation method thereof
A metal bipolar plate and fuel cell technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve problems such as corrosion resistance and insufficient electrical conductivity, and achieve a product that is not easy to fall off, has excellent overall performance, and high adhesion Effect
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Embodiment 1
[0036] Such as figure 1 with 2As shown, a metal bipolar plate for a fuel cell includes a bipolar plate body, the two sides of the bipolar plate body are respectively used to form a hydrogen flow field and an air flow field, and both sides of the bipolar plate body are raised with flow field ridges 1. Flow field grooves 2 are formed between adjacent flow field ridges 1 on the same surface. When assembled, the body of the bipolar plate is attached to the proton exchange membrane. Among them, the flow field ridge 1 and the proton exchange membrane are attached to each other, and the flow The field groove 2 is used as the air / hydrogen flow channel. The bottom and side surfaces of the flow field groove 2 of the bipolar plate body are coated with a layer of anti-corrosion film 4, and the surface of the flow field ridge 1 is coated with a layer of doped conductive carbon material. Conductive resin coating3. Among them, the side used to form the hydrogen flow field, the flow field g...
Embodiment 2
[0042] The preparation method of the fuel cell metal bipolar plate with the structure in the above embodiment 1, the steps are as follows:
[0043] (1) Use mechanical, chemical or electrochemical methods to roughen the surface of the untreated bipolar plate body, and the surface roughness Ra value is 0.4 μm; weigh and record the treated bipolar plate body ;
[0044] (2) Disperse the polyvinylidene fluoride (PVDF) used to form the anti-corrosion film in water, then spread it evenly on the surface of the bipolar plate body by dipping, dry it at 120°C, and check the bipolar plate by weighing method The amount of PVDF on the surface, when the amount of PVDF on the surface of the bipolar plate does not meet the index requirements, repeat the steps of dipping, drying, and weighing until the index requirements are met;
[0045] Baking the bipolar plate at a temperature of 215°C and holding it for 30 minutes to form a PVDF anti-corrosion film;
[0046] (3) Remove the anti-corrosion ...
Embodiment 3
[0050] The preparation method of the fuel cell metal bipolar plate with the structure in the above embodiment 1, the steps are as follows:
[0051] (1) Use mechanical, chemical or electrochemical methods to roughen the surface of the untreated bipolar plate body, and the surface roughness Ra value is 0.8 μm; weigh and record the treated bipolar plate body ;
[0052] (2) Disperse the polyvinylidene fluoride (PVDF) used to form the anti-corrosion film in water, then spread it evenly on the surface of the bipolar plate body by spraying, dry it at 120°C, and check the bipolar plate by weighing method The amount of PVDF on the surface, when the amount of PVDF on the surface of the bipolar plate does not meet the index requirements, repeat the steps of dipping, drying, and weighing until the index requirements are met;
[0053] Baking the bipolar plate at 225°C and keeping it warm for 20 minutes to form a PVDF anti-corrosion film;
[0054] (3) Remove the anti-corrosion film and me...
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Abstract
Description
Claims
Application Information
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