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Surface modification method of aluminum alloy bipolar plate for proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, which is applied to fuel cell components, fuel cells, battery electrodes, etc., can solve problems such as environmental pollution, high cost, and complex processing procedures, and achieve simple processing procedures, low cost, and stability. good effect

Active Publication Date: 2019-08-30
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for surface modification of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell, the aluminum alloy bipolar plate for a proton exchange membrane fuel cell is The surface modification method should solve the technical problems such as complex processing procedures, high cost and environmental pollution existing in the surface technology of aluminum alloy bipolar plates for proton exchange membrane fuel cells in the prior art

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  • Surface modification method of aluminum alloy bipolar plate for proton exchange membrane fuel cell
  • Surface modification method of aluminum alloy bipolar plate for proton exchange membrane fuel cell
  • Surface modification method of aluminum alloy bipolar plate for proton exchange membrane fuel cell

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Embodiment 1

[0061] A method for surface modification of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell, comprising the steps of:

[0062] (1) Preparation of etching solution: prepare a NaOH solution with a concentration of 0.025M;

[0063] (2) Preparation of 3-aminopropyltriethoxysilane (APTS) solution: The preparation ratio of 3-aminopropyltriethoxysilane (APTS) solution is: V (water): V (ethanol): V (APTS)=75:22:3, adjust the pH to 4 with acetic acid, and hydrolyze at 35°C for 20 hours.

[0064] (3) Preparation of graphene oxide (GO) aqueous solution: prepare a graphene oxide aqueous solution with a concentration of 1 mg / ml, and adjust the pH of the graphene oxide solution to 12.

[0065] (4) Pretreatment of aluminum alloys: 3 pieces (①, ②, ③) of 130mm×400mm×3mm aluminum alloy 5052 were polished by 1#, 3#, 6# metallographic sandpaper respectively, and then placed in acetone. Ultrasonic cleaning for 5 minutes, blowing dry with nitrogen, then rinse with absolut...

Embodiment 2

[0076] A method for surface modification of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell, comprising the steps of:

[0077] (1) Preparation of etching solution: prepare a NaOH solution with a concentration of 0.025M;

[0078] (2) Preparation of 3-aminopropyltriethoxysilane (APTS) solution: The preparation ratio of 3-aminopropyltriethoxysilane (APTS) solution is: V (water): V (ethanol): V (APTS)=75:22:3, adjust the pH to 4 with acetic acid, and hydrolyze at 35°C for 20 hours.

[0079] (3) Preparation of graphene oxide (GO) aqueous solution: prepare a graphene oxide aqueous solution with a concentration of 1 mg / ml, and adjust the pH of the graphene oxide solution to 12.

[0080] (4) Pretreatment of aluminum alloy: After polishing the aluminum alloy 6061 with a specification of 130mm×400mm×3mm by 1#, 3#, and 6# metallographic sandpaper, place it in acetone, clean it ultrasonically for 5 minutes, blow it dry with nitrogen, and then Rinse with absolute...

Embodiment 3

[0088] A method for surface modification of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell, comprising the steps of:

[0089] (1) Preparation of etching solution: prepare a NaOH solution with a concentration of 0.1;

[0090] (2) Preparation of 3-aminopropyltriethoxysilane (APTS) solution: The preparation ratio of 3-aminopropyltriethoxysilane (APTS) solution is: V (water): V (ethanol): V (APTS)=97:0:3, adjust the pH to 4 with acetic acid, and hydrolyze at 35°C for 20 hours.

[0091] (3) Preparation of graphene oxide (GO) aqueous solution: prepare a graphene oxide aqueous solution with a concentration of 1 mg / ml, and adjust the pH of the graphene oxide solution to 12.

[0092] (4) Pretreatment of aluminum alloy: After polishing 3 specifications of 130mm×400mm×3mm aluminum alloy 5052 with 1#, 3#, 6# metallographic sandpaper respectively, put it in acetone, ultrasonically clean it for 5 minutes, and dry it with nitrogen gas. Then rinse with absolute eth...

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Abstract

The invention provides a surface modification method of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell. The surface modification method comprises the steps of firstly, pre-processing aluminum alloy by taking a NaOH aqueous solution as an etching liquid so that a surface of the aluminum alloy is hydroxylated; secondly, performing self-assembly on a water-ethanol mixed solution of 3-aminopropyltriethoxysilane, performing self-assembly on a graphene aqueous solution, and performing thermal processing in a drying box; and finally, reducing and oxidizing graphene in hydrazine hydrate steam, thereby obtaining the aluminum alloy bipolar plate with a modified 3-aminopropyltriethoxysilane-reduced oxidized graphene composite membrane. By the surface modification method, the corrosion-resistant performance of the aluminum alloy bipolar plate in a proton exchange membrane fuel cell simulation liquid is greatly improved, and the contact resistance is relatively low; and moreover, the aluminum alloy bipolar plate is low in cost and is simple to operate, and industrial production on a large scale can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a proton exchange membrane fuel cell technology, in particular to a surface modification method of an aluminum alloy bipolar plate for a proton exchange membrane fuel cell. Background technique [0002] As one of the green energy sources, fuel cells have broad application prospects in transportation, military and portable power sources due to their advantages of high energy conversion efficiency and no pollution. Among them, proton exchange membrane fuel cells (PEMFC) have the advantages of high power density, low operating temperature, fast start-up, long service life, etc., and are most likely to replace fossil fuels as the power source of vehicles and other vehicles. The bipolar plate is another key material in PEMFC besides the membrane and the catalyst. It occupies 70% to 80% of the battery weight and 45% of the cost. It plays a very important role in ensuring the stable opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0228H01M8/0208H01M8/0213H01M4/88
CPCH01M4/8803H01M8/0208H01M8/0213H01M8/0228Y02E60/50Y02P70/50
Inventor 徐群杰万云霄陈晓航杨灵慧秦真兰闵宇霖沈喜训
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER