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Preparation method for alkaline anion-exchange membrane electrode

An alkaline anion, exchange membrane technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high corrosion resistance, high demand, asbestos film thickness, etc., to improve the anion exchange rate, expand the scope of use, The effect of high safety

Active Publication Date: 2012-06-13
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this type of battery is an acidic system, it has high requirements for the corrosion resistance of materials such as plates, seals, and deflectors. The Nafion membrane has a high demand for water, and the water management in the battery is relatively complicated. The research progress of PEMFC has been affected by the precious metal Pt and other reasons
Alkaline fuel cells have been successfully used in spaceflight as early as the 1960s. They have many advantages such as low price and high reliability. However, because they use concentrated lye as the electrolyte, they must remove trace amounts of CO in the air when they are used on the ground. 2 , the fuel gas cannot contain CO 2 , and the asbestos film used as a diaphragm is too thick, resulting in low OH-transport efficiency

Method used

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  • Preparation method for alkaline anion-exchange membrane electrode
  • Preparation method for alkaline anion-exchange membrane electrode

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preparation example Construction

[0022] The preparation method of alkaline anion exchange membrane electrode, the step comprises:

[0023] ⑴Fix the alkaline anion exchange membrane with a thickness of 0.16-0.25mm on the return frame, and spray a layer of deionized water with a mass ratio of 70-80% and 20-30% deionized water on both sides of the exchange membrane in the frame. The suspension that basic anion resin is mixed into is used as spraying material, and dries under natural environment, and each of two sides of basic anion exchange membrane forms a layer of binding agent; When the air pressure reaches 2-0.3MPa, start the spray gun, and the spray material will be sprayed evenly through the small hole in the mouth of the spray gun;

[0024] ⑵According to the area of ​​the binder in step ⑴, according to 2-5mg / cm 2 Weigh the Pt / C catalyst, add nano-conductive carbon black with a mass ratio of 40-60% to Pt / C, add 5-20g of deionized water and 5-20g of solvent, and stir well to make a catalyst mixed slurry A...

Embodiment 1

[0028] ⑴ Select the Neosepta series AHA type 0.2mm anion exchange membrane from Tokuyama Company in Japan, fully soak it in NaOH solution, rinse it with clean water, and use it as the basic anion exchange membrane 1. Fix the alkaline anion exchange membrane on the back frame, the inner frame The area is 50cm 2 Get 0.5g Japanese Tokuyama company anionic resin, add 2g deionized water, form suspension liquid binder after fully stirring, binder is put into the feed bin of high-pressure gas spray gun, the air pressure of high-pressure gas spray gun is adjusted to 0.2MPa, The binder is evenly sprayed onto both sides of the basic anion exchange membrane, and dried in a natural environment;

[0029] (2) Weigh two parts of 0.2g 50%Pt / C catalyst and 0.3g nano-conductive carbon black, respectively add 8g deionized water and 8g isopropanol, stir well, and configure two parts of mixed slurry; Put the mixed slurry into the feed bin of the high-pressure gas spray gun, adjust the air pressur...

Embodiment 2

[0033] (1) Select a 0.2mm thick Morgane-ADP alkaline anion exchange membrane, fully soak it in NaOH solution, rinse it with clean water, and use it as an alkaline anion exchange membrane. Fix the alkaline anion exchange membrane on the back-shaped frame, and the inner frame area is 50cm 2Get 0.8 g Japan Tokuyama company anionic resin, add 2g deionized water, form suspension liquid binder after fully stirring, binder is put into high-pressure gas spray gun feed bin, the air pressure of high-pressure gas spray gun is adjusted to 0.2MPa, will The binder is uniformly sprayed on both sides of the alkaline anion exchange membrane, and dried in a natural environment.

[0034] (2) Weigh two parts of 0.4g 40%Pt / C catalyst and 0.6g nano-conductive carbon black respectively, add 15g deionized water and 15g isopropanol, stir well, and configure two parts of mixed slurry; mix one part Put the slurry into the feed bin in the high-pressure gas spray gun, adjust the air pressure of the high-...

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Abstract

The invention relates to a preparation method for an alkaline anion-exchange membrane electrode. The method comprises the following steps: (1) spraying a layer of binder on two surfaces of an alkaline anion-exchange membrane; (2) spraying a catalyst layer on the binder, wherein the surface of porous carbon paper sprayed with a gas diffusion layer is accordingly arranged on the catalyst layer; (3) carrying out hot pressing and natural cooling so as to obtain the alkaline anion-exchange membrane electrode. According to the invention, a high-pressure gas spray gun is used for successively spraying alkaline anion resins and the catalyst layers on two surfaces of the alkaline anion-exchange membrane, which enables a three-in-one assembly with stable uniformity and bonding tightness to be formed and the anion exchange rate of an alkaline fuel cell to be enhanced; the diffusion layers are arranged on the catalyst layers through hot pressing so as to form a five-in-one assembly, which enables the anion exchange rate of the alkaline fuel cell to be further enhanced, thereby producing an effect on improvement of performance of the fuel cell; when the electrode prepared in the invention is used to substitute a diaphragm and alkaline electrolyte in an alkaline fuel cell, the prepared alkaline fuel cell has high security and an enlarged application scope.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a preparation method of an alkaline anion exchange membrane electrode. Background technique [0002] At present, the leading electrolyte membrane used in proton exchange membrane fuel cell (PEMFC) is the Nafion series membrane produced by Du Pont Company of the United States. This membrane has good proton conductivity, acid and alkali resistance, chemical stability, mechanical properties and long service life, etc. However, since this type of battery is an acidic system, it has high requirements for the corrosion resistance of materials such as plates, seals, and deflectors. The Nafion membrane has a high demand for water, and the water management in the battery is relatively complicated. The research progress of PEMFC has been affected by reasons such as precious metal Pt. Alkaline fuel cells have been successfully used in spaceflight as early as the 1960s. They...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 李勇辉徐志彬刘浩杰易炜任丽彬
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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