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Application of membrane electrode in basic anion exchange membrane fuel cell

An anion exchange membrane, alkaline anion technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of high cost of precious metal catalysts, reduce battery performance, increase battery internal resistance, etc., to improve battery efficiency and conductivity. Reduce and improve the effect of mass transfer

Active Publication Date: 2011-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalysts currently have certain problems, such as the high cost of noble metal catalysts, which is not conducive to their commercial development, MnO 2 The catalytic layer composed of other catalysts will increase the internal resistance of the battery and reduce the efficiency of the battery due to its poor conductivity.
At the same time, because the fuel permeated from the anode will undergo an oxidation reaction on the surface of the cathode catalyst, a mixed potential will be generated, which will reduce the performance of the battery.

Method used

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Examples

Experimental program
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Embodiment 1

[0028] The structure of the membrane electrode is as figure 1 As shown, there are 6 parts including anode conductive porous substrate, anode microporous layer, anode catalyst layer, anion exchange membrane, cathode carbon material layer and cathode conductive porous substrate.

[0029] Membrane electrodes are prepared by the following process:

[0030] Anion-exchange membrane pretreatment: the self-made quaternary ammonium salt-type anion-exchange membrane is converted into an OH-type anion-exchange membrane by ion exchange, soaked in deionized water for cleaning, and cut into slices of appropriate size when used;

[0031] Preparation of the anode: PTFE is used to impregnate the commercially available carbon paper of SGL Company for hydrophobic treatment, and the mass percentage of PTFE after treatment is 15%. Commercial XC-72 activated carbon powder is dispersed in ethanol, and the slurry is coated on the above-mentioned carbon paper to make a microporous layer. Commerciali...

Embodiment 2

[0040] The structure of the membrane electrode is as figure 1 As shown, there are 6 parts including anode conductive porous substrate, anode microporous layer, anode catalyst layer, anion exchange membrane, cathode carbon material layer and cathode conductive porous substrate.

[0041] Membrane electrodes are prepared by the following process:

[0042] Wherein, anode, anion exchange membrane obtaining method are with embodiment 1;

[0043]Preparation of cathode: use PTFE to impregnate commercial SGL carbon paper for hydrophobic treatment, the mass percentage of PTFE is between 20% and 70%; disperse commercial carbon nanotubes in ethanol to prepare a slurry, and then brush evenly Make cathode on above-mentioned carbon paper; The load of this cathode carbon material is 4mg / cm 2 ;

[0044] Membrane electrode assembly and battery operating conditions are the same as in Example 1;

[0045] The IV polarization curve of the battery is shown in image 3 As shown, the peak power d...

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Abstract

The invention relates application of a membrane electrode in a basic anion exchange membrane fuel cell. The application is characterized in that: a carbon material directly serves as an oxygen reduction catalyst used for a cathode of a basic anion exchange membrane fuel cell. The method for adopting the carbon material as a catalyst directly realizes the advantages of greatly reduced cost, simplepreparation cost, high catalytic performance, inertia on penetrated fuel and the like. The method for adopting the carbon material as the catalyst directly has the advantages that: the method is easyto realize, the precision is high, the performance is reliable and the like, and is suitable for the basic anion exchange membrane fuel cell.

Description

technical field [0001] The invention relates to an alkaline anion exchange membrane fuel cell, in particular to the application of a membrane electrode (MEA) in the alkaline anion exchange membrane fuel cell. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel and oxidant into electrical energy. Grove first proposed the concept of a fuel cell in 1842, and the fundamentals of its operation and even its primary electrode material, the precious metal platinum, have not changed since then. [0003] Traditional Alkaline fuel cells (AFC) use H 2 As a fuel, KOH is a type of electrolyte with the best low-temperature (below 200°C) fuel cells. The main reason is that in alkaline electrolytes, the electrochemical activity of both the cathode and the anode is relatively high. At the same time, the application of low-cost non-metallic cathode and anode catalysts such as (Ni and Ag) has also been reported. The biggest problem facing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/22
CPCY02E60/50
Inventor 孙公权柳鹤姜黔齐静王素力
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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