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A kind of fuel cell catalyst, its preparation method and application in fuel cell

A technology of fuel cells and catalysts, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large transmission resistance of reaction gases and poor electrocatalytic ability of catalysts, etc., to improve corrosion resistance, reduce water repellency, and prevent transmission resistance increased effect

Active Publication Date: 2021-08-06
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the electrocatalytic ability of the catalyst is relatively poor, and the transmission resistance of the reaction gas is relatively large

Method used

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  • A kind of fuel cell catalyst, its preparation method and application in fuel cell
  • A kind of fuel cell catalyst, its preparation method and application in fuel cell
  • A kind of fuel cell catalyst, its preparation method and application in fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (1) Modification of carbon support:

[0100] (a) Add 51 mg of sodium lauryl sulfate to 50 g of deionized water, mix and stir evenly, and make an aqueous dispersant solution;

[0101] (b) Measure 0.2512 g of dispersant aqueous solution, add 0.3023 g of mesoporous carbon into it, and ultrasonically uniformly obtain solution A;

[0102] (c) Dissolve 0.2mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorochemical Co., Ltd., D50 particle size is about 30nm) in 6.8mL of deionized water, mix and stir for 10min to make a mass concentration of 1.8% 0.0079g sulfonate type anionic fluorosurfactant (Xuejia Fluoro Silicon Chemical Co., Ltd., Actyflon-S100) was added to the high polymer aqueous dispersion, mixed and stirred for 10min to obtain solution B , the mass concentration of the sulfonate type anionic fluorosurfactant in the solution B is 0.1%;

[0103] (d) Add all the solution A into the solution B, mix and stir for 30min;

[0104] (e) Filtrate the mixed sol...

Embodiment 2

[0112] (1) Modification of carbon support:

[0113] (a) 0.2137g of graphite and 0.1359g of graphene were added to 0.38mL of glycerol, and the solution was uniformly ultrasonicated to obtain solution A;

[0114] (b) Dissolve 0.2mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorochemical Co., Ltd., D50 particle size is about 50nm) in 5.8mL deionized water, mix and stir for 20min to make the mass concentration 2.1% 0.0602g sulfonate type anionic fluorosurfactant (Xuejia Fluoro Silicon Chemical Co., Ltd., Actyflon-S100) was added to the high polymer aqueous dispersion, mixed and stirred evenly to obtain solution B , the mass concentration of the sulfonate type anionic fluorosurfactant in the solution B is 1.0%;

[0115] (c) Add all of the solution A into the solution B, and mix and stir for 20 minutes;

[0116] (d) Filtrate the mixed solution to obtain a solid, wash with 3 mL of deionized water, dry at 90°C, grind, and calcinate at 360°C for 20 minutes to obtain ...

Embodiment 3

[0124] (1) Modification of carbon support:

[0125] (a) 21mg of polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer and 14mg of cetyltrimethylammonium bromide are added to 50g of deionized water, mixed and stirred evenly, and made into an aqueous dispersant solution;

[0126] (b) Measure 0.6008g of aqueous dispersant solution, add 0.3567g of carbon black and 0.1935g of carbon fiber into it, mix and stir evenly to obtain solution A;

[0127](c) Dissolve 1mL of 60wt% polytetrafluoroethylene resin dispersion (Daijin Fluorine Chemical Co., Ltd., D50 particle size is about 70nm) in 11mL of deionized water, mix and stir for 60min, and make a high concentration of 5.0%. Polymer aqueous dispersion; 0.2409g diol type fluorosurfactant (Dajin Fluorine Chemical Co., Ltd., PEG20000) was added in the high polymer aqueous dispersion, mixed and stirred for 60min to obtain solution B, in which two The mass concentration of alcohol type fluorosurfactant is 2.0%;

[0128] (d) Add ...

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Abstract

The invention relates to a fuel cell catalyst, its preparation method and application in fuel cells. The fuel cell catalyst comprises a carbon material with oxygen-containing functional groups on the surface, a solidified high polymer distributed in the inner pores of the carbon material, and metal Pt distributed on the surface of the carbon material. In the fuel cell catalyst of the present invention, the high polymer is filled into the internal pores of the carbon material, which not only improves the corrosion resistance of the fuel cell catalyst, but also effectively prevents noble metal particles from entering the internal pores of the carbon material, resulting in the formation of precious metals in the carbon carrier. It is difficult to form an effective three-phase reaction interface on the particle surface, which improves the utilization rate of noble metal particles; and the present invention introduces oxygen-containing functional groups on the surface of carbon materials, which can reduce the hydrophobicity of carbon. In addition, oxygen-containing functional groups can also be used as precious metals. The nucleation center of the particle.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell catalyst, its preparation method and its application in fuel cells. Background technique [0002] As an important component in the field of renewable new energy, fuel cells have attracted widespread attention from all walks of life. First of all, different from many energy storage devices such as lithium-ion batteries and supercapacitors, fuel cells are an excellent energy conversion device, as long as there is a continuous supply of fuel, they can always generate electricity; compared with internal combustion engines, The fuel cell is not limited by the Carnot cycle, and the energy conversion efficiency is greatly improved, and the cathode reactant of the fuel cell is oxygen in the air, which comes from a wide range of sources. The whole process only generates electricity, heat and water, and does not produce greenhouse gases or any pollution. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92
CPCH01M4/926Y02E60/50
Inventor 朱雅男于力娜唐柳张克金杨帅朱云
Owner FAW JIEFANG AUTOMOTIVE CO
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