Self-humidification membrane electrode for proton exchange membrane fuel cell and preparation method thereof

A proton exchange membrane, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of inability to achieve high-performance self-humidification/non-humidification, low temperature adaptation range, and achieve excellent self-humidification performance , Improve moisturizing performance, increase the effect of anti-diffusion power

Inactive Publication Date: 2013-05-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although the preparation of self-humidifying membrane electrodes by adding moisturizing inorganic substances in the anode catalytic layer has been reported, however, the current self-humidifying membrane electrodes have various defects such as low temperature adaptation range, and cannot achieve ideal high-performance self-humidifying membrane electrodes. Humidification / non-humidification effect

Method used

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  • Self-humidification membrane electrode for proton exchange membrane fuel cell and preparation method thereof
  • Self-humidification membrane electrode for proton exchange membrane fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The first step is to take 4cm × 4cm NAFION212 proton exchange membrane. First place it in 80 ° C for 1 hour in the hydrogen percentage of 5%percentage concentration. After distilled water washing, at 0.5 mol.l, -1 Treat it at 80 ° C in the sulfate solution for 1 hour, and then wash it with distilled water.The processed proton exchange membrane is placed on the fixed framework of the preparation film electrode, and the size of the active area is 5cm 2 To prevent the membrane from shrinking and deformation during the process of spraying catalyst slurry;

[0042] In the second step, take 1g of polyvinyl alcohol (PVA) to dissolve into 99g of ionic water, and the water solution with a PVA with a mass of 1%is made;

[0043] The third step takes 1g of gas phase silica to scattered in 1L ofopenol, and the quality concentration is 1g.L. -1 The isopropanol suspension liquid of the silicon dioxide;

[0044] Step 4 Press 10: 4: 0.1: 0.1: 500 The mass ratio is called a PT / C catalyst (Hi...

Embodiment 2

[0068] In addition to changing the NAFION 212 film to Nafion 117 membrane, a polyethylene alcohol solution with a mass of 1%to 1%to a beeflytic acid solution with a shell polycan with a mass of 1 ‰, 1g.L -1 The alcohol suspension of the gas phase silicon dioxide was changed to 1g.L -1 The alcohol of titanium pink is divided into turbidity liquid, and the PT / C catalyst (Hispec 4100, Johnson Matthey) with a PT content of 40%in the fourth step is changed to a PT / C catalyst with a PT content of 20%(E-TEKCompany) Outside, and press 10: 2.5: 0.1: 0.1: 300 ratios, which are called PT / C catalysts with a 6.2mg content of 20%, 31.3mg general fluorine sulfonic acid resin solution (5WT% NaFion, Dupont), 78.9mg No. 1The quality percentage concentration in the two -step preparation is the acetic acid solution of the shell with 1 ‰, the titanium pink isopropyl amoid alcohol suspension in the third step of 28 μl, and the 0.2 g ofopenol.The preparation method of membrane electrode is the same as E...

Embodiment 3

[0072] In addition to changing a polyethylene alcohol solution with a mass of 1%to a polyethylene pyrirol (PVP) solution with a mass percentage concentration of 1 ‰, 1 G.L will be 1g.L -1 The alcohol suspension of the gas phase silicon dioxide was changed to 1g.L -1 Jiekou SIO 2 (MCM-41) The isopropanol suspension solution, the PT / C catalyst (Hispec 4100, Johnson Matthey) with a PT content of 40%in the fourth step is to 1: 1: 1: PTRU atomic ratio with a total PTRU content of 40%is 1:1 PTRU / C catalysts, as well as 10: 3: 0.1: 0.1: 500 ratio, respectively, which are called PT / C catalysts (E-TEK) with a 3.1mg content of 20%, respectively5WT%NaFion, Dupont), 41mg of ethanol solution with PVP with a mass of 1 ‰, and 1g.L of 25 μL -1 The alcohol suspension and 0.2 g ofopenol of the silicon dioxide, the remaining steps are the same as the embodiment 1, the preparation method of the membrane electrode is the same as the embodiment 1.

[0073] Except for the mass ratio of 10: 4: 0.1: 500, ...

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Abstract

The invention discloses a self-humidification membrane electrode for a proton exchange membrane fuel cell and a preparation method thereof. The preparation method comprises the following steps of 1, pre-treating a proton exchange membrane, 2, mixing a carbon-supported platinum or platinum-ruthenium catalyst, a perfluorinated sulfonic acid resin, a hydrophilic organic polymer and an inorganic oxide and in water or a low-boiling point solvent, carrying out ultrasonic treatment to obtain catalyst slurry, and carrying out spray-coating of the catalyst slurry on one side of the proton exchange membrane by an illumination direct-coating technology to obtain an anode catalyst layer, 3, carrying out spray-coating of slurry without the hydrophilic organic polymer and the inorganic oxide on the other side of the proton exchange membrane to obtain a cathode catalyst layer, and 4, carrying out lamination of a gas diffusion layer and the proton exchange membrane of which the two sides are coated with the catalyst layers to obtain the self-humidification membrane electrode. The anode catalyst layer contains the hydrophilic organic polymer and the inorganic oxide so that the self-humidification membrane electrode has excellent self-humidification performances at a high cell temperature and low humidity.

Description

Technical field [0001] The invention involves the field of mass exchange membrane fuel cell technology, and specially involves a self -wetting film electrode and preparation method for proton exchange membrane fuel cells. [0002] Background technique [0003] Fuel battery is a device that can directly convert fuel chemistry into electrical energy.Among them, proton exchange membrane fuel cells (PEMFC) have the advantages of low temperature rapid start, high energy conversion efficiency, high energy density and zero emissions, and are considered the most hoped for the power source of portable power and electric vehicles. [0004] The core component of a proton exchange membrane fuel cell is a membrane electrode, and the membrane electrode is usually composed of proton exchange membrane, anode catalyst, and cathode catalytic layer.Relief is strongly dependent on water content.When they are in a dry state, the proton conduction rate is almost zero; only when the proton exchange mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86
CPCY02E60/50
Inventor 廖世军梁华根党岱熊旺
Owner SOUTH CHINA UNIV OF TECH
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