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Acid-base blended membrane for fuel cell and preparation method thereof

A fuel cell and blend membrane technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as dimensional stability decline, and achieve the effect of reducing swelling rate, high open circuit voltage, and enhancing mechanical stability performance.

Active Publication Date: 2021-01-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although silica particles are cheap, easy to synthesize, and controllable in shape, they have become a commonly used Nafion membrane modification material, but because silica can cause ion migration and aggregation, it will have a negative effect on membrane performance.
The introduction of too much heteropoly acid will also lead to a decrease in the dimensional stability of the membrane.

Method used

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  • Acid-base blended membrane for fuel cell and preparation method thereof
  • Acid-base blended membrane for fuel cell and preparation method thereof
  • Acid-base blended membrane for fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 20g of norbornene dioic anhydride and 100mL of glacial acetic acid, add them into a 500mL round bottom flask, and stir until completely dissolved under the action of ultrasound. Then 45 g of hexamethylenediamine was added into the round bottom flask, heated to 125° C. in an argon atmosphere, condensed and refluxed for 3 hours, and an orange-yellow transparent solution was prepared.

[0051] The above solution was cooled to room temperature, washed three times with 150mL dichloromethane and 150mL deionized water respectively, neutralized with 1M NaOH solution to pH = 9, then washed three times with 150mL deionized water, anhydrous Na 2 SO 4 Dry, apply to a silica gel chromatography column, and purify with eluent petroleum ether: ethyl acetate = 1: 1 to prepare orange-yellow viscous polymer monomer 3,6-endomethylene-1,2 ,3,6-Tetrahydro-N-(6'-aminohexyl)-cis-phthalimide.

[0052] Weigh 0.3g of the polymer monomer prepared above, dissolve it in 25mL of dry dichlorom...

Embodiment 2

[0056] The basic organic polymer solution was prepared according to the method in Example 1.

[0057] Weigh 5g of 5% Nafion solution, evaporate the solvent to dryness under vacuum at 60°C, then dissolve it in 15mL of DMF, add 0.877g of the basic organic polymer solution prepared above, and stir and mix for 6h at 60°C under argon atmosphere. Cast the uniformly mixed solution on a 3.5cm×3.5cm glass sheet to form a film, place it in an electric blast drying oven, heat it up to 60°C and dry it for 8 hours, then heat it up to 100°C, and dry it in vacuum for 10 hours to prepare an acid-base blend film .

[0058] The acid-base blend membrane prepared in this example contains 5 wt% of basic organic polymer.

Embodiment 3

[0060] The basic organic polymer was prepared according to the method in Example 1.

[0061] Weigh 5g of 5% Nafion solution, evaporate the solvent to dryness under vacuum at 60°C, then dissolve in 15mL of DMF, add 1.852g of the basic organic polymer solution prepared above, and stir and mix for 6h at 60°C under argon atmosphere. Cast the uniformly mixed solution on 3.5cm×3.5cm tin foil to form a film, place it in an electric blast drying oven, heat it up to 60°C and dry it for 8 hours, then heat it up to 100°C, and dry it in vacuum for 10 hours to prepare an acid-base blend film .

[0062] The acid-base blend membrane prepared in this example contained 10 wt% of a basic organic polymer.

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Abstract

The invention relates to an acid-base blended membrane for a fuel cell, which is prepared by the following steps: preparing a polymer monomer from norbornene dianhydride and hexamethylenediamine, andcarrying out ring-opening metathesis polymerization reaction on the polymer monomer and norbornene to prepare a randomly polymerized alkaline organic polymer with the average number-average molecularweight of 160000-180000; obtaining a mixed solution composed of an alkaline organic polymer solution and a Nafion resin solution according to the composition of 90-97.5 wt% of Nafion resin and 2.5-10wt% of an alkaline organic polymer, and using the mixed solution to form an acid-base blended film having a structure represented by the following structural formula.

Description

technical field [0001] The invention belongs to the technical field of membrane material preparation, and relates to a proton exchange membrane for a fuel cell, in particular to an acid-base blend membrane applicable to a fuel cell and a preparation method of the acid-base blend membrane. Background technique [0002] Proton exchange membrane fuel cell is a new type of power generation device that converts chemical energy into electrical energy. It uses renewable energy hydrogen and oxygen as power raw materials, has the advantages of environmental friendliness, high energy conversion efficiency, high specific power, etc., and has been widely used in aerospace, new energy vehicles and other fields. [0003] As the core component of the fuel cell, the membrane electrode plays the role of providing an electrochemical reaction site and conducting hydrogen ions, which directly determines the cost, performance and life of the fuel cell. Membrane electrodes usually consist of a d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/103H01M8/1039H01M8/1069C08G61/12
CPCC08G61/12C08G2261/122C08G2261/143C08G2261/3324C08G2261/418H01M8/103H01M8/1039H01M8/1069Y02E60/50
Inventor 王超刘蕾何振峰宋瑞东王淑艳
Owner ZHONGBEI UNIV
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