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Polar plate structure, preparation method thereof, bipolar plate with polar plate structure and fuel cell

A polar plate structure and bipolar plate technology, applied in fuel cells, fuel cell parts, circuits, etc., can solve problems such as short service life and lack of corrosion resistance, and achieve extended life, improved performance, and improved corrosion resistance sexual effect

Pending Publication Date: 2021-06-01
浙江锋源氢能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the harsh operating environment of metal bipolar plates, strict restrictions are placed on the conductivity and corrosion resistance of the coating. The currently selected conductive coating materials have a great lack of corrosion resistance, or The initial performance is better, but the service life is relatively short

Method used

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  • Polar plate structure, preparation method thereof, bipolar plate with polar plate structure and fuel cell

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preparation example Construction

[0060] According to an embodiment of the present application, a method for preparing the above-mentioned pole plate structure includes the following steps:

[0061] This embodiment provides a method for preparing a metal bipolar plate, which specifically includes the following steps:

[0062] Step (1): preprocessing, specifically includes the following steps:

[0063] 1) First pretreatment: degreasing, etching, cleaning and drying are performed on the metal substrate 1 in sequence. Specifically, the selected metal substrate 1 is degreased for the first time with 1M sodium hydroxide solution at 80°C; after cleaning, it is cleaned with alcohol for the second degreasing; use alumina polishing paste or diamond Polish the substrate with a brightener such as polishing paste, and then wash it with pure water. The cleaned metal substrate 1 is stored in pure water and cleaned with clean nitrogen before use;

[0064] 2) The second pretreatment: using bias magnetron multi-arc ion coati...

Embodiment 1

[0072] The metal substrate 1 of this embodiment is made of 316L stainless steel.

[0073] Step (1): Use 1mol / L sodium hydroxide solution on the metal substrate 1 for the first degreasing treatment at 80°C; then clean the metal substrate 1 after the first degreasing, and then use alcohol Perform a second degreasing wash. Then, the substrate is polished with alumina polishing paste, cleaned with pure water after polishing, the cleaned metal substrate 1 is stored in pure water, and cleaned with clean nitrogen before use;

[0074] Step (2): Using bias magnetron arc ion coating equipment, the processed metal substrate 1 in step (1) is sent into a vacuum chamber, and the vacuum degree is evacuated to a vacuum of 5×10 -3 Pa, and heat the metal substrate 1 to 180°C, pass in argon gas of about 1 Pa, and set the bias voltage -800V; perform surface ion sputtering on the metal substrate 1, and etch and activate it for 5 minutes;

[0075] Step (3): Set the argon gas flow rate to 300 sccm...

Embodiment 2

[0081] The metal substrate 1 of this embodiment is selected from 316L stainless steel.

[0082] Step (1): Use 1M sodium hydroxide solution to degrease the metal substrate 1 at 80°C for the first time; then clean the metal substrate 1 after the first degreasing, and then perform the second degreasing treatment with alcohol Second degreasing cleaning. Then, the substrate is polished with a diamond polishing paste, cleaned with pure water after polishing, and the cleaned metal substrate 1 is stored in pure water and purged with clean nitrogen before use.

[0083] Step (2): Using bias magnetron arc ion coating equipment, send the processed product in step (1) into a vacuum chamber, and evacuate the vacuum to a vacuum of 5×10 -3 Pa, and heat the metal substrate 1 to 180° C., pass in argon gas of about 1 Pa, and set a bias voltage of -800V; carry out surface ion sputtering and etching activation on the metal substrate 1 for 5 minutes.

[0084] Step (3): Set the argon gas flow rate...

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Abstract

The invention provides a polar plate structure, a preparation method thereof, a bipolar plate with the polar plate structure and a fuel cell, the polar plate structure comprises a metal substrate and a metal oxide layer, and the metal oxide layer is arranged on the surface of the metal substrate. According to the polar plate structure and the preparation method thereof as well as the bipolar plate and the fuel cell with the polar plate structure, the corrosion resistance of the metal polar plate can be effectively improved.

Description

technical field [0001] The application belongs to the technical field of fuel cells, and in particular relates to a polar plate structure, a preparation method thereof, a bipolar plate having the same, and a fuel cell. Background technique [0002] At present, in the fuel cell industry, such as PEM electrolysis hydrogen production and PEMFC fuel cell, the bipolar plate is one of the important components of the fuel cell. In the past, the main material of the bipolar plate was graphite, which was expensive, so that the cost of the bipolar plate material accounted for 25%-35% of the entire battery cost; and the graphite material also had the defect of poor machining performance, so it has the advantages of low price. , Bipolar plates made of metal materials with good machining performance, good toughness and good strength. In the prior art, the method of modifying the metal substrate is to deposit a corrosion-resistant coating on the surface of the metal substrate by physical...

Claims

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Application Information

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IPC IPC(8): H01M8/0228H01M8/0206H01M8/0213C23C14/08C23C14/06C23C14/58C23C14/32C23C14/02
CPCH01M8/0228H01M8/0206H01M8/0213C23C14/081C23C14/083C23C14/0605C23C14/586C23C14/325C23C14/0021C23C14/021C23C14/028C23C14/022Y02E60/50
Inventor 上官鹏鹏王海峰王利生
Owner 浙江锋源氢能科技有限公司
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