Membrane electrode for hydrogen-oxygen fuel cell and preparation method thereof, and hydrogen-oxygen fuel cell

Abstract

The invention provides a preparation method of a membrane electrode for a hydrogen-oxygen fuel battery. The method comprises the following steps of S1, preparing catalyst slurry 1 and catalyst slurry2; S2, spraying the catalyst slurry 1 onto a proton exchange membrane to form a first catalyst layer; S3, spraying the catalyst slurry 2 onto the surface of the first catalyst layer to form a second catalyst layer, wherein the noble metal content of a catalyst 1 in the catalyst slurry 1 is higher than the noble metal content of a catalyst 2 in the catalyst slurry 2; the mass ratio of the catalyst2 in the prepared catalyst slurry 2 to a proton exchange membrane solution is lower than the mass ratio of the catalyst 1 in the prepared catalyst slurry 1 to the proton exchange membrane solution; the spraying speed of the catalyst slurry 2 is higher than that of the catalyst slurry 1; the solid content in the catalyst slurry 2 is lower than that of the catalyst slurry 1. The prepared membrane electrode catalyst layer prepared by the method provided by the invention has the duplex gradients of the ingredient and the structure, and solves the problems of high production cost, poor performance,unsmooth transmission of hydrogen gas, oxygen gas, protons and electrons inside the catalysis layer of the hydrogen-oxygen fuel battery.

Description

technical field [0001] The invention relates to the technical field of hydrogen-oxygen fuel cell preparation, in particular to a membrane electrode for a hydrogen-oxygen fuel cell, a preparation method thereof, and a hydrogen-oxygen fuel cell. Background technique [0002] A hydrogen-oxygen fuel cell is an energy conversion device that converts the chemical energy contained in hydrogen and oxygen into electrical energy. Hydrogen-oxygen fuel cells have the characteristics of high operating efficiency, high energy density, low emissions, no noise, and modularization. It has broad application prospects in the fields of transportation (aircraft, automobiles, ships), distributed power generation, and backup power. [0003] Hydrogen and oxygen react inside the fuel cell to generate electricity, and more specifically, chemical reactions occur on both sides of the membrane electrode. Therefore, the membrane electrode is the core component of the hydrogen-oxygen fuel cell, and its p...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a membrane electrode for a hydrogen-oxygen fuel cell, so as to overcome the problems of high production cost, poor performance, and poor transmission of hydrogen, oxygen, protons and electrons in the catalytic layer of the hydrogen-oxygen fuel cell.

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