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Development of Membrane Electrode Assemblies Based on Oxygen Plasma Activated Carbon Nanotubes and their Application in a Novel Modular Test System with Hydraulic Compression

  • The membrane electrode assemblies (MEA) for polymer electrolyte membrane fuel cells (PEMFC) developed at the Westphalian Energy Institute are based on oxygen plasma activated carbon nanotubes (CNT) doped with platinum particles. For electrode preparation an ink is used containing the activated CNTs as well as hydrophobic and hydrophilic material in solved form. After this ink is sprayed onto a graphitic substrate platinum particles are deposited by pulse plating method, where the plasma activation enhances CNT dispersibility as well as platinum deposition. This materials mixture is structured in nanoscale with the aim to increase the catalyst particles’ specific surface. For low reactance at operation, homogeneous compression of the MEA’s layers is necessary within a PEMFC. A novel stack architecture for electrochemical cells, especially PEMFC as well as PEM electrolysers, has been developed in order to achieve ideal cell operation conditions. Single cells of such a stack are inserted into flexible slots that are surrounded by a hydraulic medium which is pressurised during operation in order to achieve an even compression and cooling of the stack’s cells. With this stack design it has been possible to construct a test facility for simultaneous characterisation of several MEA samples. As compression and temperature conditions of every single sample are the same, the effects of e.g. different electrode configurations can be investigated with the novel test system.

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Author:Ulrich Rost, Waltraut Brandl, Michael Brodmann, Gabriela Marginean, Veronica Rigou
Parent Title (German):Konferenz: 14th Ulm Electrochemical Talks (UECT), 23.-26.06.2014 in Ulm
Document Type:Conference Proceeding
Language:English
Date of Publication (online):2014/06/24
Year of first Publication:2014
Publishing Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Release Date:2017/01/12
Note:
Veröffentlichung der Beiträge auf einem USB-Stick an die Teilnehmer.
Departments / faculties:Institute / Westfälisches Energieinstitut
Licence (German):License LogoEs gilt das Urheberrechtsgesetz

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