Surface treatment method for bipolar plate of fuel cell

A surface treatment and fuel cell technology, which is applied in the field of fuel cell bipolar plate surface treatment, can solve the problems of irreversible electric stack, accelerate the corrosion of metal bipolar plate, increase the resistance of metal bipolar plate, etc., and reduce the probability of corrosion , Conducive to low temperature storage, improve the effect of hydrophobic performance

Pending Publication Date: 2021-02-12
佛山市清极能源科技有限公司
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  • Application Information

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Problems solved by technology

However, when the fuel cell operates at rated power, a large amount of water will be produced, which will exist in the flow channel in the form of water flow, and it is often difficult for the product water to be discharged out of the stack in time, thereby blocking the flow channel of the bipolar plate and causing large If the pressure drop is severe, it will cause the stack to be flooded and lack gas, causing irreversible damage to the stack
In addition, because the product water is slightly acidic, when it adheres to the surface of the metal bipolar plate for a long time, it will accelerate the corrosion of the metal bipolar plate in

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  • Surface treatment method for bipolar plate of fuel cell
  • Surface treatment method for bipolar plate of fuel cell
  • Surface treatment method for bipolar plate of fuel cell

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[0044]The following describes the embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The following embodiments described with reference to the accompanying drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features.

[0045]seefigure 1 , The present invention provides a fuel cell bipolar plate surface treatment method, including the steps:

[0046]S1. Cleaning the bipolar pl...

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Abstract

The invention provides a surface treatment method for a bipolar plate of a fuel cell. The surface treatment method comprises the following steps: S1, cleaning the bipolar plate; S2, drying the cleanedbipolar plate; S3, preparing a nanoscale conductive hydrophobic layer on the surface of the dried bipolar plate; and S4, roughening the bipolar plate after the nanoscale conductive hydrophobic layeris prepared so as to improve the roughness of the nanoscale conductive hydrophobic layer. By the surface treatment method, the hydrophobic property of the surface of the bipolar plate can be improvedeffectively.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for treating the surface of a fuel cell bipolar plate. Background technique [0002] The fuel cell will produce water (hereinafter referred to as product water) during the working process. The current bipolar plate surface of the fuel cell has poor hydrophobic performance, and most of the water contact angles are lower than 90°, which is hydrophilic. The product water Easily attached to the surface of the bipolar plate. When the fuel cell operates at a low power, less water is produced, which adheres to the surface of the flow channel in the form of small water droplets, thus maintaining the smooth flow of gas in the flow channel. However, when the fuel cell operates at rated power, a large amount of water will be produced, which will exist in the flow channel in the form of water flow, and it is often difficult for the product water to be discharged out of the stack...

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Application Information

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IPC IPC(8): C23C14/32C23C14/02C23C14/58C23C14/06C23C14/34H01M8/0228H01M8/0258B82Y30/00B82Y40/00
CPCC23C14/32C23C14/022C23C14/5806C23C14/0641C23C14/0635C23C14/025C23C14/06C23C14/34H01M8/0228H01M8/0258B82Y30/00B82Y40/00Y02E60/50
Inventor 陆镜莲刘峰
Owner 佛山市清极能源科技有限公司
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