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Low-loss membrane electrode for fuel cell and preparation method

A fuel cell and membrane electrode technology, which is applied in fuel cells, battery electrodes, circuits, etc., can solve problems affecting application and poor improvement effects, and achieve the effects of improving stability, simple and controllable preparation methods, and easy control

Inactive Publication Date: 2018-11-23
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the fact that the membrane electrode is prone to catalyst loss, and the existing schemes have poor improvement effects, which affect its application, the present invention proposes a low-loss membrane electrode for fuel cells and a preparation method. By preparing a three-dimensional inverse opal structure Porous and ordered catalyst layer, thereby improving the stability of the catalyst layer and reducing the loss of Pt nanoparticles

Method used

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Experimental program
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Effect test

Embodiment 1

[0031] (1) Uniformly disperse polystyrene monodisperse colloidal microspheres with a diameter of 1 μm in absolute ethanol, and obtain a polystyrene monodisperse colloidal microsphere dispersion by ultrasonic oscillation;

[0032] (2) Place the multi-layer glass fiber porous membrane with a thickness of 0.3 mm in the polystyrene monodisperse colloidal microsphere dispersion, and heat it in a water bath under a low pressure of 360 Pa at a heating temperature of 72 ° C. Ultrasonic vibration, so that the polystyrene monodisperse colloidal microspheres are incorporated into the interlayer of the polymer porous membrane, so that the interlayer distance is enlarged to 3 μm, and a composite layered material is obtained;

[0033] (3) Add excess potassium chloroplatinate, polyvinylpyrrolidone, and potassium bromide in a molar ratio of 1:10:13 to the composite layered material, add water and continue ultrasonic oscillation, and heat to 100°C. The temperature is controlled at 13°C / min. Af...

Embodiment 2

[0037] (1) Uniformly disperse polystyrene monodisperse colloidal microspheres with a diameter of 2 μm in absolute ethanol, and obtain a polystyrene monodisperse colloidal microsphere dispersion by ultrasonic oscillation;

[0038] (2) Place the multi-layer glass fiber porous membrane with a thickness of 0.3 mm in the polystyrene monodisperse colloidal microsphere dispersion, and heat it in a water bath under a low pressure of 360 Pa at a heating temperature of 72 ° C. Ultrasonic vibration, so that the polystyrene monodisperse colloidal microspheres are incorporated into the interlayer of the polymer porous membrane, so that the interlayer distance is enlarged to 3 μm, and a composite layered material is obtained;

[0039] (3) Add excess potassium chloroplatinate, polyvinylpyrrolidone, and potassium bromide in a molar ratio of 1:10:18 to the composite layered material, add water and continue ultrasonic oscillation, and heat to 80°C. Controlled at 13°C / min, after 5 hours of react...

Embodiment 3

[0043] (1) Uniformly disperse polystyrene monodisperse colloidal microspheres with a diameter of 1.5 μm in absolute ethanol, and obtain a polystyrene monodisperse colloidal microsphere dispersion by ultrasonic oscillation;

[0044] (2) Place the multi-layer glass fiber porous membrane with a thickness of 0.3 mm in the polystyrene monodisperse colloidal microsphere dispersion, and heat it in a water bath under a low pressure of 360 Pa at a heating temperature of 72 ° C. Ultrasonic vibration, so that the polystyrene monodisperse colloidal microspheres are incorporated into the interlayer of the polymer porous membrane, so that the interlayer distance is enlarged to 3 μm, and a composite layered material is obtained;

[0045] (3) Add an excess of potassium chloroplatinate, polyvinylpyrrolidone and potassium bromide in a molar ratio of 1:10:12 to the composite layered material, add water and continue ultrasonic oscillation, heat to 90°C, the heating rate Controlled at 13°C / min, af...

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Abstract

The invention provides a low-loss membrane electrode for a fuel cell and a preparation method. Polystyrene mono-dispersed colloidal microspheres are uniformly dispersed into absolute ethyl alcohol, amulti-layer sheet-shaped glass fiber hole film is placed as a substrate, and under a low-pressure condition at a temperature of 70-75 DEG C, water bath heating is carried out; meanwhile, ultrasonic oscillation is carried out; then potassium chloroplatinate, polyvinylpyrrolidone and potassium bromide are added to be reacted; and after the reaction is completed, the product is soaked in a toluene solution to dissolve and remove a polymer, and standing for 24 hours is performed, and next, the washed and dried product is compounded with a proton exchange membrane and a gas diffusion layer so as toobtain the required membrane electrode. According to the method, the multilayer sheet-shaped glass fiber hole film serves as a substrate, and a three-dimensional porous ordered catalyst layer of an inverse opal structure is directly prepared, so that a functional layer does not need to be coated in the membrane electrode, and the defect that the membrane electrode is prone to causing catalyst loss is overcome, the stability of the catalyst layer is improved, and the loss of Pt nano particles is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a low-loss membrane electrode for fuel cells and a preparation method. Background technique [0002] Fuel cell is a new type of green energy conversion device that directly converts chemical energy stored in fuel and oxidant into electrical energy. It has the advantages of high energy density, modularization, convenient use, safety, high efficiency and environmental friendliness. It can also effectively solve the problem of energy shortage while reducing pressure. As a new green energy source in the 21st century, fuel cells have received extensive attention and vigorous promotion from scientific researchers now that environmental protection is becoming more and more important. [0003] The single cell of proton exchange membrane fuel cell PEMFC is mainly composed of main components such as anode flow field plate, membrane electrode, cathode flow field plate and sealing rings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1004H01M4/92
CPCH01M4/921H01M4/925H01M8/1004H01M2008/1095Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD