SPE membrane electrode and preparation technology thereof

Abstract

The invention discloses an SPE membrane electrode which is arranged in an SPE electrolytic cell comprising the SPE membrane electrode, a bipolar plate, an end plate and a sealing gasket. The SPE membrane electrode comprises a proton exchange membrane, a catalyst embedded into the proton exchange membrane, and a polyester frame surrounding the edge of the surface of the bipolar plate and being in charge of connecting with the bipolar plate. The invention further discloses a preparation technology of the SPE membrane electrode. The preparation technology comprises the steps of catalyst sprayingpreparation, catalyst spraying, proton exchange membrane clipping, hot pressing preparation, hot pressing and post treatment. The SPE membrane electrode is simple in structure, convenient to manufacture and low in cost; the utilization ratio of the proton exchange membrane is raised significantly; the consumption of the proton exchange membrane is reduced; the cost of the SPE membrane electrode islowered; the connecting strength between the membrane electrode and the bipolar plate is ensured and improved; the spraying efficiency of the catalyst and the manufacturing efficiency of the SPE membrane electrode are improved substantially; and the productive capacity potential of the SPE electrolytic cell is released fully.

Description

technical field [0001] The invention relates to the field of hydrogen production by SPE electrolysis of water, in particular to an SPE membrane electrode and a preparation process thereof. Background technique [0002] Hydrogen energy is the most ideal energy source in the future. Hydrogen production by electrolysis of water has broad development prospects. SPE electrolysis of water for hydrogen production, that is, Solid Polymer Electrolyte electrolysis of water for hydrogen production, is called solid polymer electrolyte electrolysis of water for hydrogen production technology. The core of this technology is a solid polymer electrolyte electrolysis cell, such as attached Figure 5 As shown, the SPE electrolytic cell is generally composed of a membrane electrode 100, a bipolar plate 200, an end plate 300, and a gasket 400. The left and right sides of the membrane electrode 100 are provided with a bipolar plate 200, and the membrane electrode 100 and the bipolar plate 200 a...

AI Technical Summary

Problems solved by technology

[0004] 1. When the proton exchange membrane is made into a membrane-forming electrode assembly, only the middle part becomes an effective catalytic area, so the utilization rate of the proton exchange membrane is low and the dosage is large;

[0005] 2. In order to ensure the area of ​​the blank area, the catalyst needs to be carefully sprayed during the spraying process, especially at the junction of the blank area and the effective catalytic area, the spraying time is long, the fault tolerance rate is low, and the production efficiency is low;

[0006] 3. Because the catalyst is prepared as a suspension, and the amount of a single proton exchange membrane is not large, and the spraying time is too long due to the disadvantage 2, if too much catalyst is prepared, the unused part is prone to sedimentation, so it is not suitable for Large-capacity catalyst preparation can only be prepared one by one, which is time-consuming and laborious;

[0007] 4. Membrane electrodes have low production efficiency and low output, which seriously restricts the overall output efficiency of SPE electrolytic cells and has become a major pain point and bottleneck in the production of SPE electrolytic cells.

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