Process for integrating preparation and loading of catalyst layer in oxygen cathode membrane electrode

Abstract

The invention discloses a process for integrating preparation and loading of a catalyst layer in an oxygen cathode membrane electrode, which comprises the following steps of: placing uniformly mixed catalyst layer raw materials in electrostatic spinning equipment, fixing a gas diffusion layer on a receiving body, setting corresponding operating parameters, carrying out electrostatic spinning for a certain time, and after spinning is finished, separating the gas diffusion layer and the catalyst layer loaded on the gas diffusion layer from the receiver, carrying out heat treatment on the gas diffusion layer and the catalyst layer, and cooling to obtain the catalyst layer preparation and loading integrated oxygen cathode membrane electrode. By utilizing the characteristics of an electrostatic spinning technical device, the conductive gas diffusion layer is fixed on the receiving body, and the receiving and heat treatment of the catalyst layer precursor can be carried out under the condition of not influencing a high-voltage electrostatic field, so that the integrated process from preparation to loading of the catalyst layer is realized, and the technological process is simplified. By selecting a low-Pt or non-noble metal catalyst, the manufacturing cost of the membrane electrode is greatly reduced while the performance of the membrane electrode is ensured, and by utilizing the characteristic of batch manufacturing of electrostatic spinning, the process has an industrialization prospect.

Description

technical field [0001] The invention belongs to the fields of electrospinning and new energy battery membrane electrode manufacturing, and in particular relates to a process for realizing the integration of preparation and loading of a catalytic layer in an oxygen cathode membrane electrode by an electrospinning method. Background technique [0002] As representatives of new energy batteries, proton exchange membrane fuel cells and metal-air batteries have the advantages of high power density, environmental friendliness, and wide application fields. The main structural components of the common core component of the oxygen cathode membrane electrode are the gas diffusion layer and the catalytic layer. Wherein, the catalytic layer is a structure having a certain activity of catalyzing the four-electron reduction reaction of oxygen molecules. The role of the gas diffusion layer is to apply a certain buffering effect to the higher flow rate of oxygen, and make it fully contact ...

AI Technical Summary

Problems solved by technology

Although the traditional mode of separately preparing and reloading the catalytic layer and the gas diffusion layer can refine the product performance control of the two structures, it undoubtedly brings too many technological processes to the production and processing of the oxygen cathode membrane electrode.

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