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Preparation method of CrCuC gradient gradually-changed CrCu compound carbon thin film bipolar plate

A composite carbon and bipolar plate technology, which is applied to fuel cell components, ion implantation plating, fuel cells, etc., can solve the problem of PEMFC metal bipolar plates being easily corroded and passivated, and achieve improved hydrophobicity and high The effect of corrosion resistance and stable performance

Active Publication Date: 2020-12-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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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 PEMFC metal bipolar plate is easily corroded and passivated, and to provide a method for preparing a CrCuC gradient CrCu composite carbon film bipolar plate

Method used

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  • Preparation method of CrCuC gradient gradually-changed CrCu compound carbon thin film bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Polish the stainless steel (316L stainless steel) substrate, and ultrasonically clean it with acetone cleaning solution and ethanol cleaning solution for 15 minutes respectively to remove surface impurities and organic pollutants such as oil stains and rust spots, then dry it with nitrogen, and put it into a coating vacuum chamber Prepare for coating;

[0021] (2) Pump the vacuum system to 1.0×10 -3 Pa and below, pass in argon gas; turn on the high bias voltage, control the argon gas pressure 2.0Pa, bias voltage 800 V, etch and clean the target surface and stainless steel sample surface; the time is 15 min;

[0022] (3) The bias voltage was adjusted to 100 V, the argon gas pressure was 1.4-1.5 Pa, the pure CrCu metal transition layer was deposited by magnetron sputtering, the average current was 6.5 A, the voltage was 700 V, the duty cycle was 20%, and the pulse length was 3000 ms; The deposition time is 25 min, and the thickness of the CrCu metal transition layer ...

Embodiment 2

[0027] (1) Polish the stainless steel (316L stainless steel) substrate, and ultrasonically clean it with acetone cleaning solution and ethanol cleaning solution for 15 minutes respectively to remove surface impurities and organic pollutants such as oil stains and rust spots, then dry it with nitrogen, and put it into a coating vacuum chamber Prepare for coating;

[0028] (2) Pump the vacuum system to 1.0×10 -3 Pa and below, pass in argon gas; turn on the high bias voltage, control the argon gas pressure 1.5Pa, bias voltage 900 V, etch and clean the target surface and stainless steel sample surface; the time is 20min;

[0029] (3) The bias voltage was adjusted to 100 V, the argon gas pressure was 1.4-1.5 Pa, the pure CrCu metal transition layer was deposited by magnetron sputtering, the average current was 6.5 A, the voltage was 700 V, the duty cycle was 20%, and the pulse length was 3000 ms; The deposition time is 25 min, and the thickness of the CrCu metal transition layer i...

Embodiment 3

[0034] (1) Polish the stainless steel (316L stainless steel) substrate, and ultrasonically clean it with acetone cleaning solution and ethanol cleaning solution for 20 minutes respectively to remove surface impurities and organic pollutants such as oil stains and rust spots, then dry it with nitrogen, and put it into the coating vacuum Chamber preparation for coating;

[0035] (2) Pump the vacuum system to 1.0×10 -3 Pa and below, pass in argon gas; turn on the high bias voltage, control the argon gas pressure to 2.0Pa, and the bias voltage to 900 V, etch and clean the target surface and stainless steel sample surface; the time is 15 min;

[0036] (3) The bias voltage was adjusted to 130 V, the argon gas pressure was 1.4-1.5 Pa, the pure CrCu metal transition layer was deposited by magnetron sputtering, the average current was 6.5 A, the voltage was 700 V, the duty cycle was 20%, and the pulse length was 3000 ms; The deposition time is 25 min, and the thickness of the CrCu met...

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Abstract

The invention relates to a preparation method of a CrCuC gradient gradually-changed CrCu compound carbon film bipolar plate. A vacuum high-power micro-pulse magnetron sputtering technology is adopted;with a CrCu target as a sputtering target material, firstly a pure CrCu metal transition layer is deposited on the surface of stainless steel, then a carbon source is provided by methane gas, and a CrCuC gradient gradually-changed CrCu compound carbon film is deposited on the CrCu metal transition layer through sputtering. The CrCuC gradient gradually-changed CrCu compound carbon film prepared through vacuum magnetron sputtering has good binding force, the hydrophobicity of a substrate is greatly improved, and water management in a fuel cell is facilitated. As the bipolar plate of a PEMFC, the bipolar plate has an average corrosion current density being 0.65-0.71 [mu] A / cm < 2 > (potentiostatic polarization being 0.6 V) and the interfacial contact resistance being 2.84-7.34 m [omega] cm <2 > (under the pressure being 1.4 MPa), and has both high conductivity and high corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a CrCuC gradient gradient CrCu composite carbon film bipolar plate. Background technique [0002] Fuel cells are regarded as one of the most promising clean energy sources in the world. Fuel cells are mainly divided into five types according to the working environment, electrolyte and fuel of the battery: alkaline fuel cell (AFC), phosphate fuel cell (PAFC), alkali metal molten carbonate fuel cell (MCFC), oxygen ion ceramic fuel cell (SOFC), Proton Exchange Membrane Fuel Cell (PEMFC), although Proton Exchange Membrane Fuel Cell (PEMFC) started late compared with the other four fuel cells, it has developed very fast and has been valued by researchers and automobile companies in various countries. PEMFC still has problems such as high cost and difficulty in commercialization. [0003] The bipolar plate is one of the core components of PEMFC. Its mass acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/02C23C14/16C23C14/06H01M8/021H01M8/0213H01M8/0228
CPCC23C14/0036C23C14/022C23C14/025C23C14/0635C23C14/165C23C14/35H01M8/021H01M8/0213H01M8/0228Y02E60/50
Inventor 张俊彦贾倩张斌高凯雄张兴凯赖振国
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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