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Optimized preparation method of membrane electrode containing anion exchange resin transition layer used for electrolysis

An anion exchange membrane and exchange resin technology, applied in the direction of electrode shape/type, fuel cell parts, etc., can solve the problems of high price, achieve the effect of improving performance, simple and easy to control, and reducing ohmic drop loss

Active Publication Date: 2016-03-02
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, the high price is the main reason restricting the further commercial application of SPE water electrolysis technology. Therefore, how to reduce the cost and improve the electrolysis efficiency is the focus of the researchers from all over the world.

Method used

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  • Optimized preparation method of membrane electrode containing anion exchange resin transition layer used for electrolysis
  • Optimized preparation method of membrane electrode containing anion exchange resin transition layer used for electrolysis
  • Optimized preparation method of membrane electrode containing anion exchange resin transition layer used for electrolysis

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Experimental program
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Effect test

Embodiment 1

[0032] (1) Preparation of catalyst slurry: first weigh 93mgIr black, 62mg70wt.% Pt / C, then mix in a certain amount of ethanol, In propanol or n-propanol, the mass ratio of catalyst to ethanol, isopropanol or n-propanol is 1:40, and the mixed slurry is ultrasonically mixed for 20 minutes. Then according to the membrane electrode area according to 0.6mg / cm 2 Weigh the anion exchange resin, mix it with ethanol / isopropanol / n-propanol in a ratio of 1:40, and then sonicate for 15 minutes.

[0033](2) Spraying of the catalyst slurry: the ethanol, isopropanol or n-propanol solution of the anion exchange resin prepared in (1) are sprayed on both sides of the anion exchange membrane (A201), and then ultrasonically A uniform catalyst slurry was sprayed on both sides of the membrane. The above spraying operations were all carried out on a hot stage, and the temperature of the hot stage was kept constant at 60°C.

[0034] (3) Cut the sealing material: the sealing material is divided into...

Embodiment 2

[0038] Take the same membrane electrode preparation process as in Example 1, and the electrolyte of the electrolytic cell is made of KHCO with a concentration of 1wt.%. 3 The solution was replaced with deionized water, and a full battery was assembled for testing. The relevant test results are as follows: Figure 4 shown.

Embodiment 3

[0040] During the experiment, it was found that the content of resin in the catalytic layer will affect the overall performance of the electrolytic cell. By adjusting the proportion of different components in the MEA preparation process, when the mass ratio of catalyst to resin (AS-4) in the catalytic layer is 5 :1, the performance of the electrolytic cell is improved. Figure 5 It is the full battery steady-state polarization curve under the same test conditions as Example 2. At this time, the electrolytic voltage of the electrolytic cell is reduced to 1.931V@500mA / cm 2 .

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Abstract

The invention relates to an optimized preparation method of a membrane electrode containing an anion exchange resin transition layer used for electrolysis. The membrane electrode subassembly includes a specific combination of an anion exchange resin transition layer, a catalyst layer, a cathode gas diffusion layer, an anode gas diffusion layer and an anion exchange membrane. The membrane electrode subassembly prepared by the invention has a good performance when the membrane electrode subassembly uses as alkaline solid polymer electrolyte (AEM) water electrolysis. The membrane electrode has a wide utilization value in regenerative fuel cell (RFC), photoelectrocatalysis and electrolytic hydrogen generator.

Description

technical field [0001] The invention relates to a method for preparing an optimized membrane electrode containing an anion exchange resin transition layer for electrolysis, the membrane electrode assembly comprises an anion exchange membrane, an anion exchange resin transition layer, an anion / anode catalyst layer, an anion / anode gas diffusion layer specific combination. It can be applied in AEM water electrolysis, RFC or various electrolysis devices. Background technique [0002] In recent years, solid polymer electrolyte (SPE) water electrolysis technology has become a research hotspot in the field of hydrogen production due to its advantages of high efficiency, zero emissions, compact structure, environmental friendliness, and high product purity, and its high-purity oxygen product has also been used In aerospace, medical, analysis and other fields. However, the high price is the main reason that restricts the further commercial application of SPE water electrolysis tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/03H01M8/02
CPCY02E60/50
Inventor 俞红梅迟军李光福王浚英邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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