Preparation method of diffusion layer for fuel cell

Abstract

The invention relates to a preparation method of a diffusion layer for a fuel cell. The method comprises the steps of taking corn straw after corn maturation, removing the outer skin of the corn straw, taking straw substances at the soft part of the center of the corn straw, and drying the straw substances; cutting straw substances into long strips, then putting the long strips into a polar solvent to form a polar solution, and fully stirring and mixing; adding ceramic particles and a carbon oxide material into the polar solution, and fully stirring; and then carrying out pulping and papermaking, resin impregnation and carbonization in sequence, and finally acquiring the diffusion layer. Materials in the center of the corn straw are used as fibrous materials for use; the fibrous materialsare mixed with the ceramic particles and the carbon oxide material under the action of the polar solution; the ceramic particles have certain hydrophobic capacity and also have the capacity of expanding pore channels; the dredging capacity of the diffusion layer is guaranteed, and the carbon oxide material is adopted to increase the combinability of the carbon oxide material and straw substances to 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...

AI Technical Summary

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

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