Carbide and metal oxide composite coat for fuel cell metal pole plate, and production method thereof

A technology of metal plates and oxide layers, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of increased physical property differences, flat and low density of the film surface, and reduced corrosion resistance, and achieve enhanced compatibility , Accelerate the development of industrialization and improve the effect of corrosion resistance

Active Publication Date: 2015-06-17
上海氢晨新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, it is difficult to avoid pinhole defects, which leads to a decrease in corrosion resistance, and the surface of the film is flat and dense, and the difference in physical properties increases the contact resistance between the electrode plate and the gas diffusion layer.

Method used

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  • Carbide and metal oxide composite coat for fuel cell metal pole plate, and production method thereof
  • Carbide and metal oxide composite coat for fuel cell metal pole plate, and production method thereof
  • Carbide and metal oxide composite coat for fuel cell metal pole plate, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of SnO by Unbalanced Magnetron Sputtering Ion Plating Technology 2 :F+GIC:Sn film system

[0031] (1) ultrasonically cleaning the surface of the metal plate substrate 1 with acetone and absolute ethanol in sequence;

[0032] (2) Put the metal plate after ultrasonic cleaning into the unbalanced magnetron sputtering ion plating furnace cavity, and the vacuum is better than 3×10 -5 torr, filled with argon, the working pressure is kept at 4×10 -4 torr, the bias voltage of the substrate is -500V, the passivation layer of the substrate is removed by ion bombardment, the cleaning process time of ion plating and sputtering is 30min, the sample is hung on the rotating bracket, and the rotation speed of the bracket is 4r / min;

[0033] (3) The substrate bias is maintained at -60V, the Sn target current is turned on, the current is gradually increased from 0 to 6A, and the metal transition layer 2 is deposited on the surface of the metal plate substrate 1, and the dep...

Embodiment 2

[0038] Preparation of TiO by Pulse Arc Ion Plating Technology 2 +GIC:Ag film system

[0039] (1) Use acetone and absolute ethanol to ultrasonically clean the surface of the metal plate substrate successively;

[0040] (2) Dry the metal plate substrate after ultrasonic cleaning with a blower and put it on the bracket in the cavity of the multi-family ion plating furnace, and vacuumize it to 8×10 -3 Pa, enter Ar gas, apply negative bias voltage of -700V to trigger glow discharge, and perform Ar ion glow cleaning for 10 minutes;

[0041] (3) Reduce the bias voltage of the metal plate base to -500V, turn on the Ti target current of 70A, and turn on the O 2 , depositing TiO on the surface of the plate 2 To obtain a metal oxide layer, the deposition time is 10 minutes;

[0042] (4) Maintain the substrate bias, close the oxygen flow, maintain the Ti target current, deposit the metal Ti transition layer, and the deposition time is 5 minutes;

[0043] (5) Maintain the substrate bi...

Embodiment 3

[0045] Preparation of ZrO by Chemical Vapor Deposition Technology 2 +ZrC film system

[0046] (1) Use acetone and absolute ethanol to ultrasonically clean the surface of the metal plate substrate successively;

[0047] (2) Dry the metal plate substrate after ultrasonic cleaning and put it into the furnace cavity with a blower, and select Ar as the carrier gas and dilution gas, H 2 As a reducing gas, CO 2 As a carbon source gas, ZnCl 4 As a Zr source, deposit ZrO on the surface of the metal plate substrate 2 layer, the deposition time is 5 minutes. The overall chemical reaction equation is as follows:

[0048] h 2 +CO 2 =CO+H 2 o

[0049] ZrCl 4 +2H 2 O=ZrO 2 +4HCl

[0050] (3) Close the CO 2 Gas source, into CH 4 As a carbon source, Ar was introduced as a carrier gas and a diluent gas at the same time, H 2 As a reducing gas, ZnCl 4 As a Zr source, a ZrC layer is deposited on the surface of the metal plate. The overall chemical reaction equation is as follows:...

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Abstract

The invention relates to a fuel cell metal pole plate surface carbide and metal oxide composite coat and a production method. The composite coat is composed of a nanometer conductive metal oxide layer and a carbide layer which are sequentially arranged on the surface of a metal pole plate from bottom to top. The production method mainly comprises the following steps: 1, substrate surface pretreatment; 2, deposition of the metal oxide layer; and 3, deposition of the carbide layer. Compared with the prior art, the method synergistically using metal oxide as an ion barrier layer and carbide as a conductive layer to form the compact coat avoids perforating, cracks and other defects, and allows the coat to have high film-substrate binding force and good conductivity and corrosion resistance and to meat use requirements of fuel cell metal pole plates.

Description

technical field [0001] The invention relates to a preparation method in the technical field of fuel cells, in particular to a composite coating method of carbide and metal oxides for metal pole plates of fuel cells. Background technique [0002] Fuel cell is a fast start-up, high energy conversion efficiency, and environment-friendly power generation device. It has broad application prospects in transportation, electronics, national defense and other fields, and has become a research hotspot in recent years. The polar plate is one of the key components of the fuel cell, accounting for about 80% of the total volume of the entire stack, 70% of the mass and 30% to 40% of the cost. The plate mainly plays the role of supporting the membrane electrode, distributing the reaction gas, collecting current, separating the oxidizing agent and reducing agent, conducting heat, and discharging the product water. Fuel cells operate in a strongly acidic environment with a pH between 0 and 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86
CPCY02E60/50
Inventor 易培云毕飞飞彭林法来新民
Owner 上海氢晨新能源科技有限公司
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