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Porous carbon film of fuel cell gas diffusion layer and preparation method thereof

A gas diffusion layer and fuel cell technology, which is applied in fuel cells, electrical components, circuits, etc., can solve the problems of restricting the application and development of fuel cell gas diffusion layers, unfavorable industrial production, and high energy consumption. The effect of high strength and simplified preparation process

Active Publication Date: 2020-05-12
江苏飞赛迩氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] According to the above, the carbon paper and carbon cloth used as the main base layer of the fuel cell gas diffusion layer in the existing scheme, because carbon fibers are mostly used as raw materials, the preparation process of carbon fibers requires high temperature and vacuum equipment, high energy consumption, and low output. Low, unfavorable for industrialized production, restricting the application and development of fuel cell gas diffusion layer, the present invention proposes a kind of porous carbon film of fuel cell gas diffusion layer and its preparation method, which can effectively solve the above technical problems

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  • Porous carbon film of fuel cell gas diffusion layer and preparation method thereof

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Embodiment 1

[0031] (1) Mix and stir the modified carbon nanotubes with ethylenediamine, PVP, resin film former, and deionized water for 2 hours to prepare an infiltration solution, then put the glass fiber in the infiltration solution for 24 hours, and then add hydrophobic agent, conductive agent, diluent, and expansion pore-forming agent, mixed and stirred for 1 hour to obtain a precursor solution; the preparation method of modified carbon nanotubes is to mix carbon nanotubes with concentrated nitric acid at 1g: 80ml, and heat to 85 ℃ and reflux at constant temperature for 6 hours, then cool, filter, and dry; the resin film-forming agent is epoxy resin; the hydrophobic agent is polytetrafluoroethylene; the conductive agent is carbon black; the diluent is methyl acrylate; the expansion pore-forming agent is Polyaniline coated 2,4,6-triisopropyl-1,3,5-trioxane;

[0032] The ratio of each raw material is, by weight, 3 parts by weight of modified carbon nanotubes, 3 parts by weight of ethyle...

Embodiment 2

[0036](1) Mix and stir the modified carbon nanotubes with ethylenediamine, PVP, resin film former, and deionized water for 2 hours to prepare an infiltration solution, then put the glass fiber in the infiltration solution for 24 hours, and then add hydrophobic agent, conductive agent, diluent, and expansion pore-forming agent, mixed and stirred for 1 hour to obtain a precursor solution; the preparation method of modified carbon nanotubes is to mix carbon nanotubes with concentrated nitric acid at 1g: 80ml, and heat to 85 ℃ and reflux at constant temperature for 6 hours, then cool, filter, and dry; resin film-forming agent is polyacrylic acid resin; hydrophobic agent is polyhexafluoropropylene; conductive agent is conductive acetylene black; diluent is butyl acrylate; expansion pore-forming agent Coating polyaniline with 2,4,6-triisopropyl-1,3,5-trioxane;

[0037] The ratio of each raw material is, by weight, 5 parts by weight of modified carbon nanotubes, 1 part by weight of e...

Embodiment 3

[0041] (1) Mix and stir the modified carbon nanotubes with ethylenediamine, PVP, resin film former, and deionized water for 2 hours to prepare an infiltration solution, then put the glass fiber in the infiltration solution for 24 hours, and then add hydrophobic agent, conductive agent, diluent, and expansion pore-forming agent, mixed and stirred for 1 hour to obtain a precursor solution; the preparation method of modified carbon nanotubes is to mix carbon nanotubes with concentrated nitric acid at 1g: 80ml, and heat to 85 ℃ and reflux at constant temperature for 6 hours, then cool, filter, and dry; the resin film-forming agent is polyacrylic acid resin; the hydrophobic agent is polyvinylidene fluoride; the conductive agent is carbon black; the diluent is methyl methacrylate; expansion pores The agent is polyaniline coated 2,4,6-triisopropyl-1,3,5-trioxane;

[0042] The ratio of each raw material is, by weight, 8 parts by weight of modified carbon nanotubes, 2 parts by weight o...

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Abstract

The invention relates to the field of fuel cells, and discloses a porous carbon film of a gas diffusion layer of a fuel cell and a preparation method of the porous carbon film. The preparation methodcomprises the following steps: (1) mixing and stirring modified carbon nanotubes, ethylenediamine, PVP, a resin film-forming agent and deionized water to prepare an infiltration liquid, infiltrating glass fibers, and adding a hydrophobic agent, a conductive agent, a diluent and an expansion pore-forming agent to prepare a precursor solution; (2) spin-coating the precursor solution to form a film,compacting the film by using a mold, and carrying out thermocuring treatment to prepare the porous carbon film of the gas diffusion layer of the fuel cell. Compared with a traditional carbon fiber gasdiffusion layer, the porous carbon film prepared by the invention avoids high-temperature treatment of a traditional process, simplifies a preparation process, effectively reduces the production cost, and the obtained gas diffusion layer is over-high in porosity and excellent in comprehensive performance.

Description

technical field [0001] The invention relates to the field of fuel cells, and discloses a porous carbon membrane of a fuel cell gas diffusion layer and a preparation method thereof. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. Fuel cells are the fourth power generation technology after hydropower, thermal power and atomic power. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the fuel cell uses fuel and oxygen as raw materials; at the same time There are no mechanical transmission parts, so there is no noise pollution, and the emission of harmful gases is very small. It can be seen that from the point of view of saving energy and protecting the ecological env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0234H01M8/0247H01M8/1004
CPCH01M8/0234H01M8/0247H01M8/1004Y02E60/50Y02P70/50
Inventor 陈庆廖健淞杨洁何方刘超
Owner 江苏飞赛迩氢能源科技有限公司
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