Fast Delamination of Fuel Cell Catalyst-Coated Membranes Using High-Intensity Ultrasonication

Fast Delamination of Fuel Cell Catalyst-Coated Membranes Using High-Intensity Ultrasonication

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This study demonstrates a rapid and facile method for separating the central membrane and catalyst-coated material from production scrap fuel cell catalyst-coated membranes (CCMs), facilitating a circular economy of technologically critical metals.A novel approach is presented jilungin dreaming tea using high-intensity ultrasonication with two distinct sonotrode configurations for rapid delamination at ambient temperature in water.This technique utilises cavitation, where high-frequency sound waves create, expand, and collapse microbubbles, generating high-speed jets, shockwaves, and acoustic streaming.

This process effectively separates the membrane and catalyst while maintaining their overall integrity of the former.A cylindrical sonotrode (20 mm diameter) was used to optimise process parameters for smaller CCM samples to minimise time and energy consumption.To scale up the delamination process for industrial-size CCMs, a blade sonotrode (15 mm x edgewater shoes 210 mm) was employed to enable a flow process for rapid and continuous delamination.

Cavitation at the sonotrode-CCM interface was shown to facilitate the selective and rapid breakdown of the catalyst layers, enabling full delamination of the catalyst-loaded membrane within tens of seconds.This efficient and fast delamination approach offers a promising strategy for CCM recycling.