Batch recovery process and equipment for preparing membrane electrode catalyst by spraying method

Abstract

The invention discloses a batch recovery process and equipment for preparing a membrane electrode catalyst by a spraying method. According to the invention, a catalyst exceeding a spraying area in a spraying process is recovered; before the catalyst layer is prepared, the auxiliary equipment is completely coated with a carrier sheet, it is guaranteed that catalyst slurry completely falls on the carrier sheet outside an effective area, and then efficient recovery of the catalyst adhering to hardware auxiliary equipment such as a clamp is achieved through the procedures of soaking, scraping, collecting, washing and vacuum drying. The cost is reduced, and meanwhile, the air environment pollution is reduced. Meanwhile, the invention further discloses batch recovery equipment for the fuel cellcatalyst, which can achieve batch work of the catalyst recovery method, improve the working efficiency, increase the utilization rate of raw materials in production, and reduce the manufacturing cost.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a process and equipment for batch recovery of membrane electrode catalysts prepared by spraying. Background technique [0002] Proton Exchange Membrane Fuel Cells (PEMFC), as a new type of clean energy, has attracted worldwide attention due to its low pollution or even no pollution. The core component of PEMFC, the membrane electrode (Membrane Electrode Assembly, MEA), is the main place where the fuel cell redox occurs, and it is also the focus of researchers' research. The GDL method is to coat the catalyst on the proton exchange membrane to form CCM (catalyst coated membrane, which refers to the catalyst / proton exchange membrane assembly prepared by coating the catalyst on both sides of the proton exchange membrane in the fuel cell), and then heat the above layers by hot pressing technology. combined to form a membrane electrode. In the GDL method, most of them are prepared by pneum...

AI Technical Summary

Problems solved by technology

Therefore, it will cause waste of catalyst slurry, especially during the long-term spraying process, a large amount of catalyst will be deposited around the auxiliary fixture. If these catalysts are directly scrubbed off, the cost will undoubtedly be higher, and there will be certain pollution to the environment

At present, there is a gap in the market for the recovery of the catalyst slurry adhered to the hardware auxiliary equipment such as the fixture frame during the spraying process. In order to solve the problems of energy waste and environmental pollution, the overall recovery of the catalyst slurry is the current membrane electrode production process. Urgent problems

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