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Preparation method of alkaline anion exchange membrane fuel cell membrane electrode

An anion exchange membrane, alkaline anion technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as less impact on performance, and achieve the effects of improving performance, improving pore structure, and alleviating mass transfer polarization

Inactive Publication Date: 2018-05-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few studies on the preparation process of alkaline anion exchange membrane fuel cell membrane electrodes, especially the research on the influence of the pore structure modulation of AAEMFC on the performance.

Method used

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  • Preparation method of alkaline anion exchange membrane fuel cell membrane electrode
  • Preparation method of alkaline anion exchange membrane fuel cell membrane electrode
  • Preparation method of alkaline anion exchange membrane fuel cell membrane electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The membrane electrode preparation method is as follows:

[0027] Select the self-made alkaline anion exchange membrane 24cm in the group 2 .

[0028] Weigh 20.6 mg of 70% Pt / C catalyst, add 1030 microliters of n-propanol to ultrasonically disperse for 30 minutes, and then add the self-made TEA-SEBS-Cl type anion exchange resin solution to form the mass of electrocatalyst and anion exchange resin Catalyst ink with a ratio of 4:1 was ultrasonically dispersed for 60 minutes to make a catalyst slurry.

[0029] On a hot stage at 60°C, the catalyst layer slurry was sprayed on the surface of the basic anion exchange membrane, and after the solvent was completely evaporated, it was naturally cooled to obtain a catalyst-coated membrane electrode.

[0030] Put the above-mentioned catalyst-coated membrane electrode into 1 mole per liter of potassium hydroxide solution, soak for 24 hours, take it out after completion, wash away the surface lye with deionized water, and finally p...

Embodiment 2

[0036] Weigh 20.6 mg of 70% Pt / C catalyst, add 1030 microliters of n-propanol to ultrasonically disperse for 30 minutes, then add 10.3 mg of ammonium oxalate to form a catalyst ink with a mass ratio of inorganic salt and catalyst of 1:2, and ultrasonically disperse 60 minutes.

[0037] Then, the self-made TEA-SEBS-Cl type anion exchange resin solution was added to the above slurry to form a catalyst ink with a mass ratio of electrocatalyst and anion exchange resin of 4:1, which was ultrasonically dispersed for 60 minutes.

[0038] On a hot stage at 60°C, the catalyst layer slurry was sprayed on the surface of the basic anion exchange membrane, and after the solvent was completely evaporated, it was naturally cooled to obtain a catalyst-coated membrane electrode.

[0039] Put the above-mentioned catalyst-coated membrane electrode into 1 mole per liter of potassium hydroxide solution, soak for 24 hours, take it out after completion, wash away the surface lye with deionized water...

Embodiment 3

[0045]The difference from Example 1 is that the mass ratio of the inorganic salt to the catalyst is 1:1. The average pore diameter of the catalytic layer is 19.87 microns, and the specific pore volume is 1.85 cm 3 / g. Assemble the battery, the polarization curve and power density curve of the battery are as follows Figure 4 As shown, its peak power density is 98mW / cm 2 , at a current density of 208mA / cm 2 The maximum power is obtained at the position, compared with the electrode prepared by the traditional method (peak power density 95.3mW / cm 2 ), its peak power density increased by 2.7mW / cm 2 . at 250mA / cm 2 , the voltage attenuation is 0.37V, which is 0.13V slower than the traditional method.

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Abstract

The invention relates to a preparation method of an alkaline anion exchange membrane fuel cell membrane electrode. The method is mainly characterized in that: compared with the traditional catalyst slurry preparation method, a soluble inorganic salt is added into a catalyst slurry to adjust the pore size distribution of membrane electrode; according to the invention, the soluble inorganic salt isadded into the catalyst slurry, then the membrane electrode is prepared by spraying, and then the electrode is soaked in lye for alkalization to enable reaction of the inorganic salt with lye so as togenerate micropores. The electrode prepared by the "dissolution pore-forming" method has improved whole battery performance under high electric current density, and mass transfer polarization can bealleviated to certain extent.

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 fuel cell 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 proton exchange membrane fuel cell (PEMFC), it inherits the advantages of fast kinetics of the cathode oxygen reduction reaction (ORR) of the alkaline fuel cell (AFC), and is expected to fundamentally get rid of the dependence on the noble metal platinum; at the same time, it uses solid The polymer electrolyte membrane overcomes the problems of liquid electrolyte leakage and carbonation of KOH electrolyte solution in AFC, and has the advantages of both AFC and PEMFC. Therefore, AAEMFC has broad application prospects and has become a new research hotspot in the field of fuel cells. [0003] As the core of AAEMFC, the membrane electrode assembly (M...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCH01M4/8828Y02E60/50
Inventor 俞红梅覃博文贾佳高学强姚德伟邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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