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Preparation method of polymer electrolytic membrane electrode

An electrolyte membrane electrode, electrolyte membrane technology, applied in battery electrodes, circuits, electrical components and other directions, can solve the problems of reduced membrane electrode performance, increased catalyst, short service life, etc., to improve electrical performance, improve utilization, excellent long life effect

Inactive Publication Date: 2012-12-12
JIANGSU ICE CITY INSULATION MATERIALS STOCK
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above deficiencies, the purpose of the present invention is to propose a new method for preparing polymer electrolyte membrane electrodes, to overcome the problems in the prior art that the performance of the membrane electrodes is reduced, poor stability and short service life due to the swelling of the proton exchange membrane. The polymer electrolyte membrane electrode prepared by this method will not cause the phenomenon of swelling and wrinkling of the proton exchange membrane, and can also make the catalyst particles fully contact with the proton exchange membrane, thereby increasing the adhesion and binding force of the catalyst and improving the performance of the catalyst. The utilization rate of the membrane electrode can be improved, and the overall performance of the membrane electrode can be improved, and its long service life can be extended.

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  • Preparation method of polymer electrolytic membrane electrode
  • Preparation method of polymer electrolytic membrane electrode
  • Preparation method of polymer electrolytic membrane electrode

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preparation example Construction

[0019] The preparation method of the polymer electrolyte membrane electrode provided by the present invention adopts the "heat setting method" to fix the proton exchange membrane, that is, the proton exchange membrane is flatly spread on the substrate and heated to the glass transition temperature, generally the polymer electrolyte membrane is heated to the glass transition temperature Within the range of ±20 degrees; make the proton exchange membrane in a viscous flow state close to melting, and then perform casting, printing or spraying of the catalyst slurry. The solvent in the catalyst slurry evaporates instantly at high temperature, which will not cause the proton exchange membrane to swell and become wrinkled, and the catalyst particles will be in full contact with the proton exchange membrane that is close to the molten state, so that the catalyst and the proton exchange membrane can be combined It is more compact, increases the binding strength of the membrane electrode...

Embodiment 1

[0028] Choose a 50-micron thick perfluorosulfonic acid resin membrane, fix it on a porous stainless steel plate and heat it to 120 degrees (glass transition temperature is 135 degrees), and keep heating slowly to maintain a viscous flow state. The Pt / C (40%) catalyst, 5% perfluorosulfonic acid resin and isopropanol that take by weighing make the Pt / C catalyst: perfluorosulfonic acid resin: the mass ratio of isopropanol is 1: 10: 500, ultrasonic Shake for 8 minutes to form the catalyst solution to be sprayed, take 1.000g of the solution in 500ml.min -1 .cm -2 At the same time, the commercial carbon paper was soaked in 30% PTFE emulsion for 1 minute, and then placed in a muffle furnace at 340°C for 90 minutes to form a hydrophobic carbon paper, which contained 10% PTFE carbon powder paste is coated on the hydrophobically treated carbon paper, and the coated carbon powder load is 1.0mg / cm 2 , and finally the gas diffusion layer coated with a carbon layer and the proton exchang...

Embodiment 2

[0030] A 60-micron-thick acid-doped polybenzimidazole membrane was selected, fixed on a porous stainless steel plate and heated to 420 degrees (the glass transition temperature was 430 degrees), and kept heating slowly to maintain a viscous flow state. The Pt / C (40%) catalyst that takes by weighing, 5% polybenzimidazole membrane resin and Virahol make Pt / C catalyst: acid-doped polybenzimidazole resin: the mass ratio of Virahol is 1: 10 : 500, ultrasonic vibration for 8 minutes to form the catalyst solution to be sprayed, take 1.000g of the solution in 100ml.min -1 .cm -2 The above-mentioned acid-doped polybenzimidazole film was cast on the above-mentioned acid-doped polybenzimidazole film. At the same time, the commercial carbon paper was soaked in 30% PTFE emulsion for 1 minute, and then placed in a muffle furnace at 340°C for 90 minutes to form a hydrophobic carbon paper. Paper, the toner paste containing 10% PTFE is coated on the hydrophobic treated carbon paper, the coat...

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Abstract

A preparation method of a polymer electrolytic membrane electrode, by weight, comprises the following steps of (1) conducting pretreatment of a polymer electrolytic membrane; (2) preparing catalyst mixture; (3) forming a three-in-one membrane electrode assembly; (4) preparing a diffusion layer; and (5) preparing the five-in-one polymer electrolytic membrane electrode. The preparation method adopts a heat setting method to fix a proton exchange membrane, solves the problem that the membrane electrode is low in performance, poor in stability, short in service life and the like in preparation of a traditional membrane electrode caused by swelling of the proton exchange membrane, enables a catalyst and the proton exchange membrane to be tightly bonded, accordingly improves adherence force and bonding force of the catalyst, further improves comprehensive performance of the membrane electrode and prolongs service life of the membrane electrode.

Description

technical field [0001] The invention relates to a preparation method of a polymer electrolyte membrane electrode, which is suitable for proton exchange membrane fuel cell (PEMFC), direct methanol fuel cell (DMFC), alkaline fuel cell (AFC), electrolyzed water hydrogen production device and regenerative fuel cell Preparation of membrane electrodes for electrochemical devices such as (RFC). Background technique [0002] As an efficient and environmentally friendly power generation device that directly converts chemical energy into electrical energy through electrochemical reactions, fuel cells have broad application prospects in small and medium-sized power stations, electric vehicles, and portable power supplies. At the same time, the reverse process electrolysis water hydrogen production device of the fuel cell can easily produce high-purity hydrogen without carbon monoxide, sulfide and nitride from water, which is widely used in chemical industry, energy, electronics, metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 朱浩朱艾成刘发喜董文超胡媛媛
Owner JIANGSU ICE CITY INSULATION MATERIALS STOCK