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Preparation method for membrane electrode of alkali anion exchange membrane fuel cell

An alkaline anion, fuel cell membrane technology, applied in battery electrodes, circuits, electrical components, etc., to achieve the effect of improving performance and stability, strong adhesion, and promoting conduction

Inactive Publication Date: 2017-01-11
DALIAN 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

At present, most of the literature reports improve the stability of the battery from the perspective of materials, and there are few studies on the stability of AEMFC from the perspective of the preparation process of the electrode catalytic layer.

Method used

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  • Preparation method for membrane electrode of alkali anion exchange membrane fuel cell
  • Preparation method for membrane electrode of alkali anion exchange membrane fuel cell
  • Preparation method for membrane electrode of alkali anion exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 0.1715 g of 5% chloromethylated resin I-60 solution with an analytical balance, and add 1.6 ml of a mixed solvent of tetrahydrofuran and n-propanol to prepare a polymer resin solution.

[0034] Weigh 34 mg of 70% Pt / C catalyst, add 1.7 ml of n-propanol to ultrasonically disperse for 30 minutes, then add the above-mentioned polymer resin solution to form a catalyst with a mass ratio of 4:1 between electrocatalyst and chloromethylated polymer Ink, ultrasonically dispersed for 60 minutes.

[0035] On a hot stage at 60°C, spray the catalytic layer slurry on the surface of the basic anion exchange membrane, and the area of ​​the sprayed electrode is 24cm 2 , the spraying temperature is room temperature, and the spraying pressure is 0.1MPa. After the solvent is completely evaporated, it is naturally cooled to obtain a catalytic layer film-coated electrode.

[0036] Soak the above-mentioned catalyst-coated membrane electrode in 33% trimethylamine aqueous solution for 2...

Embodiment 2

[0042] The membrane electrode preparation method is as follows:

[0043] Select the self-made alkaline anion exchange membrane 24cm in the group 2 .

[0044] Weigh 0.1715 g of 5% chloromethylated resin I-80 solution by mass fraction, and add 1.6 ml of a mixed solvent of tetrahydrofuran and n-propanol to prepare a polymer resin solution.

[0045] Weigh 34 mg of 70% Pt / C catalyst, add 1.7 ml of n-propanol to ultrasonically disperse for 30 minutes, then add the above-mentioned polymer resin solution to form a catalyst with a mass ratio of 4:1 between electrocatalyst and chloromethylated polymer Ink, ultrasonically dispersed for 60 minutes to make a catalyst slurry.

[0046] On a hot stage at 60°C, spray the catalytic layer slurry on the surface of the basic anion exchange membrane, and spray the electrode area to 24cm 2 , the spraying temperature is room temperature, and the spraying pressure is 0.1MPa.

[0047] After the solvent is completely evaporated, it is naturally cool...

Embodiment 3

[0056] Different from Example 1, the catalyst on the cathode side uses Fe 3 Co / C, the catalyst loading is 0.4mg / cm 2 . The dispersant is a mixture of tetrahydrofuran and isopropanol, and the mixing ratio is 5:3 (volume ratio); other operations and conditions are the same as in Example 1, and the battery is assembled, and the polarization curve and power density curve of the battery are as follows: Figure 5 As shown, its peak power density is 83mW / cm 2 , compared to the electrode prepared by the traditional amination method (peak power density 63mW / cm 2 ), its peak power density increased by 20mW / cm 2 .

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Abstract

The invention relates to a preparation method for a membrane electrode of an alkali anion exchange membrane fuel cell. Compared with a conventional method, the preparation method is mainly characterized by comprising the steps as follows: performing amination and alkalization on resin which is subjected to chloromethylation firstly, and then preparing catalyst slurry from the resin to prepare the membrane electrode. According to the preparation method, the resin which is subjected to chloromethylation firstly is adopted to prepare the catalyst slurry to prepare the membrane electrode; and then the electrode is immersed in an amine solution to be subjected to amination, and immersed in an alkali solution to be subjected to alkalization. The performance of the cell with the electrode which is prepared by a ''post amination'' method is greatly improved; in addition, the cell proves high stability; and the operating service life of the cell at an operating temperature of 50 degrees still can be longer than 500 hours.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a method for preparing an alkaline anion exchange membrane electrode. Background technique [0002] Alkaline anion exchange membrane fuel cell (AAEMFC) is a new type of fuel cell developed in recent years. Compared with the traditional alkaline fuel cell (AFC), AAEMFC uses a solid electrolyte, which solves and alleviates the leakage of the liquid electrolyte in the AFC and the carbonation of the KOH electrolyte solution; compared with the proton exchange membrane fuel cell (PEMFC), Since the fuel cell cathode oxygen reduction reaction (ORR) kinetics is accelerated under alkaline conditions, the AAEMFC can fundamentally get rid of the dependence on Pt-based noble metals. It is precisely because AAEMFC has the advantages of both AFC and PEMFC, and solves the problems faced by the two to a certain extent, so AAEMFC has broad application prospects. At present, AAEMFC is gradually becoming...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/94
CPCH01M4/88H01M4/94Y02E60/50
Inventor 俞红梅高学强贾佳刘艳喜邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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