Membrane electrode assembly of fuel cell

Abstract

A membrane electrode assembly of a fuel cell comprises: an electrolyte membrane (500) as an ion transfer medium, a bipolar plate (400) having a fuel-side open groove (410) and a bipolar plate having an air-side open groove (420) Between the plates (400), fuel flows in the fuel-side open groove (410), and air flows in the air-side open groove (420), so that the electrolyte membrane and the fuel-side open groove (410) form a fuel path, and form an air path with the air-side open groove (420); and a catalyst electrode (510) inserted into the fuel-side open groove and separated from the electrolyte membrane (500), thereby utilizing both sides of the catalyst electrode (510) The formation of the fuel path and the initiation of electrochemical oxidation of the fuel can improve the current generation efficiency by generating activation on the fuel electrode provided with the fuel and the air electrode provided with the air.

Description

technical field [0001] The present invention relates to a fuel cell, and more particularly to a fuel cell MEA (membrane electrode assembly, membrane electrode assembly), which can promote electrochemical oxidation and reduction occurring on a fuel electrode (positive electrode) and an air electrode (negative electrode) A reaction wherein fuel is provided in the fuel electrode and air is provided in the air electrode. Background technique [0002] Fuel cells have been proposed as an alternative to fossil fuels. In the fuel cell, hydrogen-containing fuel is continuously provided, while oxygen-containing air is continuously provided, and hydrogen and oxygen undergo an electrochemical reaction, so that the energy difference before and after the reaction is directly converted into electrical energy. [0003] According to the type of fuel, operating temperature and catalyst, etc., fuel cells can be divided into various types. [0004] figure 1 and figure 2 An example of a fue...

AI Technical Summary

Problems solved by technology

[0012] However, in this conventional structure, when hydrogen ions generated by the catalytic reaction of the catalyst layer 221 of the fuel electrode 220 move to the air electrode 230 through the coating layer 222, the catalyst layer 221, and the electrolyte membrane 210, since the catalyst layer of the fuel electrode 220 221 is coated on the electrolyte membrane 210, so the coated catalyst layer 221 disturbs the movement of hydrogen ions towards the air electrode 230 through the electrolyte membrane 210, and the ion effect (catalysis) is only produced on one side of the catalyst layer 221, on the contrary , does not generate ion interaction on the side in contact with the electrolyte membrane 210, thereby reducing the current generation efficiency

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