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A kind of preparation method of diffusion layer for fuel cell

A fuel cell and diffusion layer technology, which is applied in the preparation/purification of carbon, battery electrodes, circuits, etc., can solve the problems of reducing the usable time of diffusion layers and catalysts, and achieve the effect of improving the degree of bonding, ensuring quality, and reducing defects

Active Publication Date: 2022-04-12
SHANDONG JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to accelerate the reaction, a diffusion layer is generally set between the electrode and the catalyst to promote the diffusion of gas, but this setting causes many adverse effects between the catalyst and the diffusion layer, which greatly reduces the available time of the diffusion layer and the catalyst

Method used

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  • A kind of preparation method of diffusion layer for fuel cell
  • A kind of preparation method of diffusion layer for fuel cell
  • A kind of preparation method of diffusion layer for fuel cell

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Embodiment Construction

[0018] In order to clearly illustrate the technical features of the present solution, the present application will be described in detail below through specific implementation modes.

[0019] First, the diffusion layer is produced as follows:

[0020] S1. Prepare the straw material: take the corn stalk after the corn is mature, remove the outer skin of the corn stalk, take the straw material at the soft part of the center of the corn stalk, and then dry the straw material, and control the water content in the straw material at 10-15wt%;

[0021] S2. forming a suspension: cutting the straw material into long strips, the length of the straw material is 200-1000 μm, then placing it in acetone to form a polar solution, and fully stirring and mixing;

[0022] S3. Mixing functional substances: Add SiC particles and carbon oxide materials to the acetone solution and stir thoroughly. The mesh size of ceramic particles and carbon oxide materials is not less than 300 mesh, and then add ...

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Abstract

A method for preparing a diffusion layer for a fuel cell, comprising the following steps: taking mature corn stalks, removing the outer skin of the corn stalks, taking the straw material at the soft center of the corn stalk, and then drying the straw material; Long strips, and then placed in a polar solvent to form a polar solution, fully stirred and mixed; adding ceramic particles and carbon oxide materials to the polar solution and fully stirred; then beating papermaking, impregnating resin, and carbonizing in sequence, Finally, a diffusion layer is obtained. In this application, the material in the center of corn stalks is used as a fibrous material, and then mixed with ceramic particles and carbon oxide materials under the action of a polar solution. The ceramic particles have a certain hydrophobicity and the ability to expand pores, ensuring this The dredging ability of the bit diffusion layer, and the use of carbon oxide materials is to increase its combination with the straw material and form a carbon skeleton.

Description

technical field [0001] The application relates to a preparation method of a diffusion layer for a fuel cell. Background technique [0002] A fuel cell is an electrochemical power generation device that directly converts chemical energy into electrical energy through an electrochemical reaction instead of using thermal energy as a transfer medium. Therefore, the energy conversion efficiency of a fuel cell is very high. There are many devices that can complete the fuel cell process. According to different electrolytes, they can be divided into alkaline fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, solid oxide fuel cells, and proton exchange membrane fuel cells. [0003] For proton exchange membrane fuel cells, it is equivalent to the "reverse" device of water electrolysis in principle. Its single cell is composed of anode, cathode and proton exchange membrane. The anode is the place where the hydrogen fuel is oxidized, and the cathode is the place where...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88C01B32/05
CPCH01M4/8807C01B32/05Y02E60/50
Inventor 杨君王健张庆林李延骁韩广德周学升高岩飞黄万友
Owner SHANDONG JIAOTONG UNIV
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