Fuel cell bipolar plate anticorrosive coating and preparation method thereof
A fuel cell and anti-corrosion coating technology, applied in fuel cells, fuel cell components, circuits, etc., can solve the problems of metal base film failure, thin film, cumbersome and other problems, achieve easy access, excellent electrical conductivity, The effect of high conductivity
Active Publication Date: 2020-11-06
SHANGHAI JIAO TONG UNIV
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, these coating processes are often cumbersome, and the film layer is thin. In harsh environments, it is very likely that the metal substrate will leak out and cause the film layer to fail.
Method used
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Embodiment 1
[0036] This embodiment provides a method for preparing a fuel cell bipolar plate anti-corrosion coating, including:
[0037] 1) Metal plate pretreatment: Clean the pure magnesium bipolar plate with ultrasonic vibration using acetone and absolute ethanol in sequence.
[0038] 2) Preparation of the conductive colloid layer: apply the conductive colloid layer on the surface of the metal plate with a scraper;
[0039] 3) Hydrophobic carbon fiber cloth layer: cut the hydrophobic carbon fiber cloth layer to 1cm 2 Attached to the surface of the conductive colloid layer.
[0040] 4) Apply a pressure of 10-50N (30N in this embodiment) on the surface of the hydrophobic carbon fiber cloth layer to make the conductive colloid layer fully contact with the hydrophobic carbon fiber cloth layer.
[0041] 5) Put the metal pole plate coated with anti-corrosion coating into a drying box, set the temperature at 140-160°C (150°C in this embodiment) and keep it warm for 1-2 hours (2h in this embo...
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Abstract
The invention relates to a fuel cell bipolar plate anticorrosive coating and a preparation method thereof. The anticorrosive coating comprises a conductive colloid layer coated on the surface of a metal polar plate, and a hydrophobic carbon fiber cloth layer arranged on the conductive colloid layer. Compared with the prior art, the hydrophobic carbon fiber cloth is used for preventing the metal polar plate from being in contact with a corrosive medium in a battery environment. The bipolar plate is effectively protected. The corrosion speed in the battery environment can be reduced to 10<-8>-10<-7> A / cm<2>, meanwhile, the excellent conductivity of the conductive colloid and the carbon fiber cloth is utilized, the contact resistance is about 10-30 m[omega]cm<2> under 1.4 Mpa, the performanceof the bipolar plate of the fuel cell is brought into play, and the preparation method is simple and efficient.
Description
technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a fuel cell bipolar plate anticorrosion coating and a preparation method thereof. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy through an electrochemical reaction. With the shortage of energy, new energy technologies represented by hydrogen energy have received more and more attention. Proton Exchange Membrane Fuel Cell (PEMFC) has been widely used in the fields of national defense and transportation due to its high conversion efficiency, no pollution to the environment, low working temperature and long working life. [0003] The bipolar plate is one of the key components of the proton exchange membrane fuel cell, accounting for 80% of the stack volume, 70% of the mass and 29% of the cost. Bipolar plates play the roles of providing gas reaction sites, collecting curr...
Claims
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IPC IPC(8): H01M8/0228H01M8/0206
CPCH01M8/0228H01M8/0206Y02E60/50
Inventor 应韬闫鹏飞曾小勤李德江李扬欣王乐耘
Owner SHANGHAI JIAO TONG UNIV