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Gas diffusion layer for proton exchange membrane fuel cells and preparation method thereof

A gas diffusion layer and proton exchange membrane technology, which is applied to fuel cell parts, fuel cells, electrical components, etc., can solve the problems of increased preparation complexity, high equipment requirements, and large footprint, and achieve good electronic conductivity , good conductivity and mass transfer performance, low electronic resistance effect

Active Publication Date: 2012-07-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent 01132156.3 provides a method for preparing carbon fiber paper materials, using 1% dispersant and overlapping winding between carbon fiber filaments to increase the strength of carbon paper, but there is a phenomenon of filament drop during use, and the internal resistance is also relatively large
CN1417879 provides a carbon fiber paper material for fuel cells and its preparation method. The carbon fiber paper material of the invention uses short high-carbon fibers as the raw material for papermaking slurry. These short fibers of different lengths are overlapped and entangled with each other to form an excellent conductive system. It has evenly distributed pores, which ensures the uniform diffusion of gas, and overcomes the shortcomings of carbon paper resistivity, porosity and uniformity of the traditional electrode gas diffusion layer.
[0006] On the whole, self-made carbon paper generally adopts wet papermaking technology, the equipment occupies a large area, and there is a problem that high-temperature carbonization is required, which not only increases the complexity of preparation, but also requires high equipment requirements

Method used

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  • Gas diffusion layer for proton exchange membrane fuel cells and preparation method thereof
  • Gas diffusion layer for proton exchange membrane fuel cells and preparation method thereof
  • Gas diffusion layer for proton exchange membrane fuel cells and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: get 10mg polyacrylonitrile carbon fiber ( ) and 10mg carbon nanotubes ( ), add 20g of absolute ethanol, ultrasonically vibrate for 10min, then add 10.5mg10wt.% polytetrafluoroethylene emulsion to disperse evenly, place in a Buchner funnel (diameter is 70mm) vacuum filtration (vacuum degree is 0.01MPa, vacuumized The time is 10s), and the wet gas diffusion layer is prepared, and finally the wet gas diffusion base layer is placed in a high-temperature firing furnace, and fired at 340° C. for 30 minutes. The prepared gas diffusion layer is placed on both sides of the proton exchange membrane with the catalytic layer to form a membrane electrode. Place this component on both sides of the cathode and anode flow field plates to form a single cell. See Figures 3 and 4 for battery performance curves.

Embodiment 2

[0034] Embodiment 2: get 10mg polyacrylonitrile carbon fiber ( ), 10mg carbon nanofibers ( ) and 10mg carbon nanotubes ( ), add 60g of absolute ethanol, ultrasonically vibrate for 10min, then add 34mg10wt.% polytetrafluoroethylene emulsion to disperse evenly, place in a Buchner funnel for vacuum filtration (vacuum degree is 0.05MPa, and the time of vacuuming is 100s), and the preparation The wet gas diffusion layer is obtained, and finally the wet gas diffusion base layer is placed in a high-temperature firing furnace at 300° C. for 60 minutes.

Embodiment 3

[0035] Embodiment 3: get 10mg viscose-based carbon fiber ( ), 10mg carbon nanofibers ( ) and 100mg carbon nanotubes ( ), add 360g deionized water, then add 1200mg10wt.% fluorinated ethylene propylene emulsion to disperse evenly, place in a Buchner funnel for vacuum filtration (vacuum degree is 0.09MPa, and the time of vacuuming is 240s), and a wet gas diffusion layer, and finally put the wet gas diffusion substrate layer in a high-temperature firing furnace, and bake it at 400°C for 10 minutes.

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Abstract

The invention relates to a solid oxide fuel battery, especially a solid oxide fuel battery composite anode and a preparation method thereof. The composite anode comprises the materials by weight percent: 30-69.9% of nickel in terms of nickel oxide, 0.01-30% of magnesium in terms of magnesium oxide, 30-69.9% of doped zirconia (the zirconia doped with yttrium oxide (YSZ), the zirconia doped with scandium oxide (ScSZ) and / or the zirconia doped with the cerium oxide and the scandium oxide (CeScSZ), wherein the mol content of the cerium oxide, yttrium oxide and / or scandium oxide is 0.1-20%). The solid oxide fuel composite anode has characteristics of a low polarization resistance and a high activity, and improves the output performance of the battery. The novel composite anode can be applied to the solid oxide fuel battery with a flat type, a tubular type, a flat tubular type and other various construction modes.

Description

technical field [0001] The invention relates to a gas diffusion layer for a proton exchange membrane fuel cell and a preparation method thereof. The gas diffusion layer prepared by the above method can be applied in hydrogen-oxygen proton exchange membrane fuel cells, direct alcohol fuel cells, batteries with gas diffusion electrode structures, electrolytic cells and sensors. Background technique [0002] Due to its high theoretical energy density and environmental friendliness, proton exchange membrane fuel cells have attracted close attention from research institutions in various countries in recent years. Its core component, the membrane electrode (MEA), is usually composed of a gas diffusion layer, a catalytic layer, and a proton exchange membrane. The gas diffusion layer has many functions such as supporting the catalytic layer, collecting current, transporting reaction gas and discharging products, and is the core component that affects the performance of the battery....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/0234
CPCY02E60/50Y02P70/50
Inventor 孙公权高妍王素力田洋朱珊
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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