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

An anion exchange membrane, fuel cell membrane technology, applied in the direction of aqueous electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problem that the performance is difficult to meet the requirements of large-scale commercialization, and achieve the enhancement of anion conductivity, inhibition of peeling, The effect of reducing the interface resistance

Active Publication Date: 2014-09-24
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, AAEMFC is still in the research stage, and its performance is difficult to meet the requirements of large-scale commercialization.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The structure of the membrane electrode is as figure 1 shown.

[0038] Membrane electrodes are prepared by the following process:

[0039] Weigh 1 gram of commercial 5% Tokuyama anion exchange resin AS-4, add 5mL of isopropanol to seal and dissolve to make anion exchange resin solution;

[0040] Add Pt / C to the above-mentioned anion exchange resin solution and ultrasonically disperse for 1 hour to form a cathode and anode catalyst layer precursor slurry with a mass ratio of electrocatalyst and resin of 1:10;

[0041] The above catalytic layer precursor slurry was sprayed on both sides of the Tokuyama anion exchange membrane with a thickness of 28 μm, and the catalyst coated electrode was obtained after the solvent evaporated; the loading of Pt was 0.4 mgcm -2 ;

[0042] Place activated carbon powder XC-72 and PTFE solution in ethanol with a mass ratio of 1:5, and ultrasonically disperse for 0.5 hours to form a uniform cathode microporous layer precursor slurry;

[0...

Embodiment 2

[0051] The difference from Example 1 is that the anion exchange membrane is passed through 0.05mgcm -2 The AS-4 modified A201, the polarization curve and power density curve of the battery are as follows image 3 As shown, the internal resistance of the battery is 26mohm, the open circuit voltage of the battery is 1.03V, and the peak power density of the battery is 334mWcm -2 .

Embodiment 3

[0053] The difference with Example 1 is that the dispersion solvent used for the anion exchange resin is n-propanol, and the polarization curve and power density curve of the battery are as follows Figure 4 shown.

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Abstract

The invention relates to an alkaline anion-exchange membrane fuel cell, and particularly relates to a preparation method of a membrane electrode of an alkaline anion-exchange membrane fuel cell. The structure of the prepared membrane electrode comprises, in order, an anode gas diffusion layer, an anode catalysis layer, an anion-exchange membrane, a cathode catalysis layer and a cathode gas diffusion layer. According to the invention, with the addition of crosslinked anion-exchange resin in the catalysis layers, with the selection of organic solvents with good dispersive capacity and a low boiling point, and through steps of membrane modification and the like, the performance of the alkaline anion-exchange membrane fuel cell is improved greatly.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a preparation method of an alkaline anion exchange membrane fuel cell (AAEMFC) membrane electrode. Background technique [0002] With the continuous aggravation of energy crisis and environmental problems, fuel cells, as a power generation device that directly converts the chemical energy of fuel and oxidant into electrical energy, have attracted attention from all over the world because of their high efficiency and environmental friendliness. [0003] Alkaline fuel cell (AFC) is the first fuel cell developed and successfully applied in the field of space technology. Compared with traditional AFC, AAEMFC replaces KOH electrolyte with solid electrolyte, that is, anion exchange membrane, which not only makes the battery structure lighter, but also effectively avoids the leakage of electrolyte and the impact of carbon dioxide in ground application. At the same time, compared with proton e...

Claims

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Application Information

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IPC IPC(8): H01M8/08
CPCY02E60/50H01M4/88H01M4/90H01M8/1041Y02P70/50
Inventor 俞红梅杨冬蕾赵云刘艳喜邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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