Membrane electrode for proton exchange membrane water electrolysis battery and preparation thereof

A technology of proton exchange membrane and water electrolysis, which is applied in the direction of battery electrodes, solid electrolyte fuel cells, fuel cells, etc., can solve the problems of high cost and high load capacity, avoid hot pressing deformation, improve utilization rate, and protect the diffusion layer Substrate effect

Inactive Publication Date: 2009-03-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies in the prior art, provide a membrane electrode of a proton exchange membrane water electrolysis battery and its preparation method, and solve the high cost caused by the high loading of noble metal catalysts in the anode (oxygen electrode) of the proton exchange membrane water electrolysis battery The problem is to reduce the contact resistance between the catalytic layer and the membrane, reduce the corrosion of the diffusion layer and avoid the hot-pressing deformation of the electrolyte membrane on the basis of maintaining or enhancing the original electrical conductivity of the carbon material.

Method used

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  • Membrane electrode for proton exchange membrane water electrolysis battery and preparation thereof
  • Membrane electrode for proton exchange membrane water electrolysis battery and preparation thereof
  • Membrane electrode for proton exchange membrane water electrolysis battery and preparation thereof

Examples

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Embodiment 1

[0044] Such as figure 1 As shown, the membrane electrode of the proton exchange membrane water electrolysis battery involved in this embodiment includes a flow field plate 1, a support layer 2, a diffusion layer 3, and a hydrophilic thin layer structure 5, wherein:

[0045] The hydrophilic thin-layer structure 5 is formed by coating the anode (oxygen electrode) catalytic layer and the cathode (hydrogen electrode) catalytic layer on both sides of the polymer electrolyte membrane respectively.

[0046] The diffusion layer 3 includes an anode (oxygen electrode) diffusion layer and a cathode (hydrogen electrode) diffusion layer.

[0047] On both sides of the hydrophilic thin-layer structure 5, the anode (oxygen electrode) diffusion layer or cathode (hydrogen electrode) diffusion layer, support layer 3, and flow field plate 1 with a microporous structure are stacked in sequence. Tightly, a water electrolysis cell is formed, in which the hydrophilic thin-layer structure 5 and the d...

Embodiment 2

[0066] 1. Weigh 0.2086 g of TiC powder, add a small amount of isopropanol and an appropriate amount of double distilled water, ultrasonically disperse to make a suspension, add 0.1162 g (NH 4 ) 2 IrCl 6 , ultrasonically dispersed and heated to 80°C, and kept at a constant temperature for 40 minutes. The reducing agent solution (HCHO:NH 3 :H 2 O≈2:1:21, weight percent), constant temperature ultrasonic reaction for 1 hour, cooled to room temperature. Suction filter and wash the slurry until the Cl in the filtrate - The content is lower than 40ppm. In a flowing Ar atmosphere, dry at 80°C for 1 hour, then heat-treat at 500°C for 30 minutes, and then get the Ir / TiC supported catalyst (weight ratio 20:80) after cooling.

[0067] 2. Weigh 31 mg of Ir / TiC catalyst (weight ratio 20:80), add 435 mg of isopropanol and mix evenly, add 270 mg of 5% Nafion solution (perfluorosulfonic acid resin solution produced by U.S. DuPont) and 45 Milligrams of deionized water, mixed evenly, spra...

Embodiment 3

[0074] 1. Weigh 0.2086 g of TiC powder, add a small amount of isopropanol and an appropriate amount of double distilled water, ultrasonically disperse to make a suspension, add 0.1162 g (NH 4 ) 2 IrCl 6 , ultrasonically dispersed and heated to 80°C, and kept at a constant temperature for 40 minutes. The reducing agent solution (HCHO:NH 3 :H 2 O≈2:1:21, weight percent), constant temperature ultrasonic reaction for 1 hour, cooled to room temperature. Suction filter and wash the slurry until the Cl in the filtrate -The content is lower than 40ppm. In a flowing Ar atmosphere, dry at 80°C for 1 hour, then heat-treat at 500°C for 30 minutes, and then get the Ir / TiC supported catalyst (weight ratio 20:80) after cooling.

[0075] 2. Weigh 31 mg of Ir / TiC catalyst (weight ratio 20:80), add 435 mg of isopropanol and mix evenly, add 270 mg of 5% Nafion solution (perfluorosulfonic acid resin solution produced by U.S. DuPont) and 45 Milligrams of deionized water, mixed evenly, spray...

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Abstract

The invention discloses a proton exchange membrane water electrolyte battery membrane electrode and a process for preparation thereof, which belongs to the technical field of preparing hydrogen gas through electrolyzing water, wherein the proton exchange membrane water electrolyte battery membrane electrode comprises a polymer electrolyte membrane, an anode catalyst layer, a cathode catalyst layer, an anode diffusion layer, a cathode diffusion layer, a support layer and a flow field plate, wherein hydrophilic thin layer structures which are formed by catalyst are respectively brushed on both surfaces of the polymer electrolyte membrane. Anode catalyst is noble metal or metallic material, and the diffusion layer is carbon material or metallic material. A catalyst layer and the relative diffusion layer and the support layer are compacted in a titanium plate to prepare membrane electrode through utilizing external force under normal temperature. The invention lowers the load of catalyst, improves the operating factor of catalyst, avoids the deformation of membranes in the process of heat pressing, and is drawn supported from the catalytic and corrosion resistance property of an anti-corrosion diffusion layer with catalytic property, and the electrolytic property and the stability of a battery are improved. The invention has the advantages of simple technique, convenient operation and excellent repeatability.

Description

technical field [0001] The invention relates to an electrode in the technical field of fuel cells and a preparation method thereof, in particular to a membrane electrode of a proton exchange membrane water electrolysis cell and a preparation method thereof. Background technique [0002] The global energy shortage and environmental problems caused by the use of fossil fuels make the whole world consider using clean renewable energy to replace fossil energy. Renewable energy sources such as solar energy, wind energy, and tidal energy are greatly affected by environmental changes, and energy storage must be carried out during use to ensure that power users obtain a stable energy supply. Hydrogen is a clean and environmentally friendly energy carrier, which can be used as an important choice for renewable energy storage technology. At the same time, with the development of manned spaceflight technology and the continuous expansion of space activities and the continuous extensio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88H01M8/10H01M8/1004
CPCY02E60/521Y02E60/50
Inventor 隋升马丽荣余晴春胡鸣若闫巍
Owner SHANGHAI JIAO TONG UNIV
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