Three-dimensional fuel cell catalyst layer electrode and preparation method thereof

A fuel cell and catalytic layer technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficult amplification and complex manufacturing processes

Inactive Publication Date: 2019-03-26
安徽明天氢能科技股份有限公司
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic layer electrode prepared by the above method has complicated manufacturing procedures and is diff

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Three-dimensional fuel cell catalyst layer electrode and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take by weighing the Pt / C catalyst of 50mg 40wt.%, wherein 40wt.% refers to that the mass fraction of Pt in the Pt / C catalyst is 40wt.%, 15mg carbon fiber material VGCF-X and 84uL 25wt.% D79, the catalyst loading is 0.267mg / cm 2 , using ethanol as a solvent for ultrasonic dispersion treatment for 0.5h, the solid content of the prepared prefabricated slurry is 5wt.%;

[0027] Take a piece of clean proton exchange membrane with an area of ​​50cm 2 , using the ultrasonic spraying method to uniformly coat the above-mentioned fully dispersed prefabricated slurry on the proton exchange membrane;

[0028] After the coating is finished, it is placed on a hot table to air-dry for 2 hours; after the drying treatment, the three-dimensional catalytic layer electrode is obtained.

Embodiment 2

[0030] Weigh 100mg 50wt.% PtCo / C catalyst, 40mg carbon fiber material VGCF-H and 450uL5wt.% D520, the catalyst loading is 0.384mg / cm 2 , using a mixed solution of 50% ethanol and 50% isopropanol as a solvent to disperse, the solid content of the prepared prefabricated slurry is 10wt.%, ultrasonic and mechanical stirring and dispersing are each treated for 0.5h;

[0031] Take a piece of clean proton exchange membrane with an area of ​​100cm 2 , uniformly coating the above-mentioned fully dispersed prefabricated slurry on the gas diffusion layer by a knife coating method;

[0032] After the coating is finished, it is placed in a vacuum oven for drying treatment, the treatment time is 4 hours, and the treatment temperature is 60° C.; after the drying treatment, the three-dimensional catalytic layer electrode is obtained.

Embodiment 3

[0034] Weigh 100mg 50wt.% PtNi / C catalyst, 4mg multi-walled carbon nanotube material and 450uL 5wt.% D520, the catalyst loading is 0.455mg / cm 2 , using n-propanol as a solvent for dispersion, the solid content of the prepared prefabricated slurry is 12wt.%, ultrasonically dispersed for 0.5h, and then mechanically stirred for 1h;

[0035] Take a clean base material (such as PTFE film) with an area of ​​100cm 2 , using the slit coating method to uniformly coat the above-mentioned fully dispersed prefabricated slurry on the PTFE film;

[0036] Then heat-compress the PTFE film coated with the catalyst layer with a clean proton exchange membrane. The heat-compression treatment temperature is 120°C, the pressure is 0.05MPa, and the time is 5min; after the treatment, the PTFE film is removed. , performing natural air-drying treatment on the prepared catalyst coating film to obtain the three-dimensional catalytic layer electrode;

[0037] After the coating is finished, it is place...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a three-dimensional fuel cell catalyst layer electrode and a preparation method thereof. The fuel cell catalyst layer electrode is formed by processing of a catalyst material,a filler material, an ion conductor solution and a solvent; the catalyst material is a carbon-supported platinum catalyst or a carbon-supported platinum alloy catalyst; the filler material is one or amixture of at least two of a multiwalled carbon nanotube, VGCF-X and VGCF-H; the ion conductor solution is a perfluorinated sulfonic acid ionomer resin solution; and the solvent is one or a mixture of at least two of ethyl alcohol, isopropyl alcohol and normal propyl alcohol. According to the invention, three-dimensional filler material is added to a conventional catalyst layer slurry, such as acarbon nanotube or a carbon nanofiber material, and by mixing the filler material with a carbon-supported catalyst, a three-dimensional space is formed in the catalyst layer, so as to reduce the masstransfer resistance in the electrode, improve the mass transfer characteristic of the catalyst layer in a high current density, and further greatly improve the output performance and the stability ofthe fuel cell electrode.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to an efficient three-dimensional catalytic layer electrode structure and a preparation method thereof. Background technique [0002] Due to its high efficiency and environmental friendliness, proton exchange membrane fuel cells have received close attention from various research institutions in recent years. Membrane electrode (MEA), as the core component of fuel cell, usually consists of gas diffusion layer, catalytic layer and proton exchange membrane. The catalytic layer is the place where the electrochemical reaction occurs in the membrane electrode assembly (MEA). The performance and stability of the catalytic layer largely determine the electrochemical performance of the MEA. Longevity presents a higher pursuit. [0003] The traditional membrane electrode preparation method is to mix and disperse the catalyst and proton conductor (such as Nafion) in a certain proportio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/86H01M4/92H01M4/88
CPCH01M4/8605H01M4/88H01M4/8807H01M4/8828H01M4/921H01M4/926Y02E60/50
Inventor 姜永燚王志强张林松邢春美王朝云李世杭
Owner 安徽明天氢能科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap