SPE electrolytic cell module with composite flow field

Abstract

The invention discloses an SPE electrolytic cell module with a composite flow field, which is produced by assembling an anode bipolar plate, an anode diffusion layer, an anode catalytic layer, a proton exchange membrane, a cathode catalytic layer, a cathode diffusion layer and a cathode bipolar plate. An anode bipolar plate flow path is etched on a surface, which is connected to the anode diffusion layer, of the anode bipolar plate. A pure water inlet and a water oxygen outlet are disposed in the anode bipolar plate flow path. A cathode bipolar plate flow path is etched on a surface, which is connected to the cathode diffusion layer, of the cathode bipolar plate. A hydrogen gas outlet is disposed in the cathode bipolar plate flow path. Each of the anode bipolar plate flow path and the cathode bipolar plate flow path is composed of a composite flow path which includes not less than five sections in a manner of folded connection from top to bottom successively to form a snake-shaped path. A fluid flows in the snake-shaped path. A cylinder group, which is designed in a dot matrix structure, is disposed at each of a front end and a back end of each section of the flow path. The middle part of each section of the flow path is a parallel flow path ridge. The SPE electrolytic cell module greatly improves pure water diffusion performance and oxygen discharge capability of the anode bipolar plate, is low in pressure drop along the path, has high flow path area and has high work efficiency of a membrane electrode.

Description

technical field [0001] The invention relates to the fields of chemical and nuclear technology and equipment, in particular to an SPE electrolytic cell module using a composite flow field. Background technique [0002] Hydrogen is an environmentally friendly energy carrier with the advantages of cleanliness, pollution-free and renewable. Steam reforming of natural gas, water gas hydrogen production, methanol reforming hydrogen production and water electrolysis hydrogen production are all methods of industrial hydrogen production at present. In contrast, the raw material for water electrolysis hydrogen production is water, which is inexhaustible, and the reaction product is also water, which can be recycled. At the same time, water electrolysis hydrogen production has the advantages of high purity product hydrogen and flexible operation. Therefore, water electrolysis, especially the SPE electrolysis method of electrolyzing pure water, not only has high conversion efficiency a...

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Problems solved by technology

[0006] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides an SPE electrolytic cell module using a composite flow field and a method for electrolyzing pure water, which can effectively solve the problem of oxygen exhaust from the anode bipolar plate, and at the same time, the pressure drop along the process is small, and the flow Large channel area, high efficiency of membrane electrode

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