Surface modification method of titanium substrate for fuel cell

A surface modification, fuel cell technology, applied in fuel cell parts, fuel cells, circuits, etc., can solve problems such as high cost, high equipment requirements, and unfavorable large-scale applications

Inactive Publication Date: 2021-07-13
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating preparation process is complicated, the equipment requirements are high, and the cost is high, which is not conducive to large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for surface modification of a titanium substrate for a fuel cell, the steps comprising:

[0030] Step S1: Sonicate the titanium substrate in lye, dilute hydrochloric acid, deionized water, and alcohol for 15 minutes, dry it with hot air, and place it in a vacuum glove box; put anhydrous AlCl 3 Dissolve and mix with BMIC at a molar ratio of 2:1, and stir evenly to obtain acidic AlCl 3 - BMIC ionic liquid; [BMIM]BF 4 Ionic Liquids and Anhydrous CuCl 2 Dissolve and mix at a molar ratio of 2:1, and stir evenly with a magnet to obtain [BMIM]BF 4 -CuCl 2 Ionic liquid; graphene oxide was prepared by the Hummers method; 10 mL of polyhexamethylene diisocyanate and 30 mg of graphene oxide were sequentially added to a 0.1 M KCl solution, and ultrasonically mixed for 15 minutes to obtain a graphene-containing KCl solution;

[0031] Step S2, in the above acidic AlCl 3 - In the BMIC ionic liquid, the titanium substrate processed by step S1 is us...

Embodiment 2

[0036] This embodiment provides a method for surface modification of a titanium substrate for a fuel cell, the steps comprising:

[0037] Step S1: Sonicate the titanium substrate in lye, dilute hydrochloric acid, deionized water, and alcohol for 15 minutes, dry it with hot air, and place it in a vacuum glove box; put anhydrous AlCl 3 Dissolve and mix with BMIC at a molar ratio of 2:1, and stir evenly to obtain acidic AlCl 3 - BMIC ionic liquid; [BMIM]BF 4 Ionic Liquids and Anhydrous CuCl 2 Dissolve and mix at a molar ratio of 2:1, and stir evenly with a magnet to obtain [BMIM]BF 4 -CuCl 2 Ionic liquid; graphene oxide was prepared by the Hummers method; 10 mL of polyhexamethylene diisocyanate and 30 mg of graphene oxide were sequentially added to a 0.1 M KCl solution, and ultrasonically mixed for 15 minutes to obtain a graphene-containing KCl solution;

[0038] Step S2, in the above acidic AlCl 3 - In the BMIC ionic liquid, the titanium substrate processed by step S1 is us...

Embodiment 3

[0043] This embodiment provides a method for surface modification of a titanium substrate for a fuel cell, the steps comprising:

[0044] Step S1: Sonicate the titanium substrate in lye, dilute hydrochloric acid, deionized water, and alcohol for 15 minutes, dry it with hot air, and place it in a vacuum glove box; put anhydrous AlCl 3 Dissolve and mix with BMIC at a molar ratio of 2:1, and stir evenly to obtain acidic AlCl 3 - BMIC ionic liquid; [BMIM]BF 4 Ionic Liquids and Anhydrous CuCl 2 Dissolve and mix at a molar ratio of 2:1, and stir evenly with a magnet to obtain [BMIM]BF 4 -CuCl 2 Ionic liquid; graphene oxide was prepared by the Hummers method; 10 mL of polyhexamethylene diisocyanate and 30 mg of graphene oxide were sequentially added to a 0.1 M KCl solution, and ultrasonically mixed for 15 minutes to obtain a graphene-containing KCl solution;

[0045] Step S2, in the above acidic AlCl 3 - In the BMIC ionic liquid, the titanium substrate processed by step S1 is us...

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PUM

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Abstract

The invention relates to a surface modification method of a titanium substrate for a fuel cell, which comprises the following steps of: performing ultrasonic treatment on the titanium substrate in alkali liquor, acid liquor, deionized water and an organic solvent in sequence, drying the titanium substrate, and putting the titanium substrate into a vacuum box; in acidic AlCl3-BMIC ionic liquid, using the treated titanium substrate as an anode, using aluminum as a counter electrode, using platinum as a reference electrode, carrying out anode activation, and drying after cleaning with an organic solvent; in [BMIM] BF4-CuCl2 ionic liquid, using activated titanium substrate as a cathode, using copper as an anode, and carrying out electro-deposition copper plating; and in a KCl solution containing graphene, carrying out graphene oxide deposition on the copper-plated titanium substrate. The titanium substrate is treated through the anode activation technology, an oxidation film on the titanium surface can be effectively removed, and a fresh titanium surface is obtained; a compact copper plating layer is pre-plated on the titanium substrate, so that the surface of activated titanium is protected, and meanwhile, the binding force of the substrate and a subsequent graphene coating is ensured; the titanium substrate is subjected to surface modification in a plating electro-deposition mode, and the process is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for modifying the surface of a titanium substrate for a fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that converts chemical energy in hydrogen fuel and oxidant into electrical energy. Its product is only water, which has the advantages of high energy conversion efficiency, no pollution, long service life, and high power density. At present, it has become a research hotspot in the direction of battery energy storage technology. [0003] As one of the key components of PEMFC, the bipolar plate has the functions of collecting and conducting current, separating fuel and oxide, transporting gas, heat transfer and supporting the stack, which requires the plate to have good thermal conductivity and excellent acid resistance. Corrosiveness and high mechanical strength. Commonly used bipolar plates include graphite bipolar p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/00C25D9/04C25D5/38C25D3/66H01M8/0228H01M8/0206
CPCC25D7/00C25D5/38C25D3/665C25D9/04H01M8/0206H01M8/0228Y02E60/50
Inventor 詹吟桥闫海郝传璞黄腾达杨敏
Owner SHANGHAI ELECTRICGROUP CORP
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