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Hydrogen fuel cell metal bipolar plate resistant to long-term corrosion

A metal bipolar plate, fuel cell technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low contact resistance of the coating, the coating is not resistant to long-term corrosion, etc., to achieve low contact resistance and excellent corrosion resistance Effect

Pending Publication Date: 2022-04-12
畔星科技(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing coating is not resistant to long-term corrosion, and to provide a hydrogen fuel cell metal bipolar plate resistant to long-term corrosion, which still has excellent corrosion resistance under long-term corrosion conditions. The contact resistance of the coating remains low after

Method used

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  • Hydrogen fuel cell metal bipolar plate resistant to long-term corrosion
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  • Hydrogen fuel cell metal bipolar plate resistant to long-term corrosion

Examples

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Effect test

Embodiment 1

[0035] A hydrogen fuel cell metal bipolar plate resistant to long-term corrosion, including a metal bipolar plate with a coating on the surface, the material of the metal bipolar plate is 316L stainless steel, the size of the metal bipolar plate is 20mm×20mm×8mm, the coating From the surface of the metal bipolar plate to the outside, there are Cr coating, CrN coating and CrTiCN coating in sequence.

[0036] The preparation method comprises the following steps:

[0037] (1) Pretreat the surface of the metal bipolar plate to obtain a clean surface of the metal bipolar plate; the pretreatment is: first use sandpaper to polish the surface of the metal bipolar plate, then polish it with a polishing machine, rinse it with distilled water, and then immerse it in Ultrasonic cleaning in ethanol and acetone solution for 30min, and drying.

[0038] (2) Put the pretreated metal bipolar plate into the vacuum chamber of the magnetron sputtering machine, and pump the pressure in the vacuum ...

Embodiment 2

[0045]A hydrogen fuel cell metal bipolar plate, comprising a metal bipolar plate with a coating on the surface, the material of the metal bipolar plate is titanium alloy, the size of the metal bipolar plate is 20mm×20mm×8mm, and the coating is made of metal bipolar plate From the surface of the plate to the outside, there are Cr coating, CrN coating and CrTiCN coating in sequence.

[0046] The preparation method comprises the following steps:

[0047] (1) Pretreat the surface of the metal bipolar plate to obtain a clean surface of the metal bipolar plate; the pretreatment is: first use sandpaper to polish the surface of the metal bipolar plate, then polish it with a polishing machine, rinse it with distilled water, and then immerse it in Ultrasonic cleaning in ethanol and acetone solution for 30min, and drying.

[0048] (2) Put the pretreated metal bipolar plate into the vacuum chamber of the magnetron sputtering machine, and pump the pressure in the vacuum chamber to 2×10 -...

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Abstract

The invention discloses a hydrogen fuel cell metal bipolar plate resistant to long-term corrosion, which comprises a metal bipolar plate with plating layers on the surface, and the plating layers are a Cr plating layer, a CrN plating layer and a CrTiCN plating layer in sequence from inside to outside on the surface of the metal bipolar plate. The corrosion-resistant coating still has excellent corrosion resistance under a long-term corrosion condition, and meanwhile, the contact resistance of the corroded coating is kept in a low state.

Description

technical field [0001] The invention relates to the technical field of fuel cell production, in particular to a hydrogen fuel cell metal bipolar plate resistant to long-term corrosion. Background technique [0002] Bipolar plates are an important part of fuel cells. The hydrogen and oxygen are separated by the bipolar plate, and at the same time, the airtightness of the battery must be ensured to prevent the hydrogen and oxygen from colluding with each other, causing combustion or even explosion. At the same time, the current of the battery is collected through the bipolar plate to act on the load. Therefore, the bipolar plate must have better compactness and conductivity. In addition to the need for good density and conductivity, the electrolyte in the battery is acidic, so the bipolar plate is in an acidic medium. In this environment for a long time, the bipolar plate is easily corroded. Therefore, the bipolar plate must have Corrosion resistance in acidic medium. At t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88H01M4/86
CPCY02E60/50
Inventor 宓保森周科秦子威汪宏斌陈卓
Owner 畔星科技(浙江)有限公司
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