Dissertation/Thesis Abstract

Characterization of porous media in proton exchange membrane fuel cell based on percolation studies
by Stacy, Stephen, M.S., Michigan Technological University, 2013, 180; 1552771
Abstract (Summary)

Water management in the porous media of proton exchange membrane (PEM) fuel cells, catalyst layer and porous transport layers (PTL) is confronted by two issues, flooding and dry out, both of which result in improper functioning of the fuel cell and lead to poor performance and degradation. The data that has been reported about water percolation and wettability within a fuel cell catalyst layer is limited to porosimetry. A new method and apparatus for measuring the percolation pressure in the catalyst layer has been developed. The experimental setup is similar to a Hele-Shaw experiment where samples are compressed and a fluid is injected into the sample. Pressure-Wetted Volume plots as well as Permeability plots for the catalyst layers were generated from the percolation testing. PTL samples were also characterizes using a Hele-Shaw method. Characterization for the PTLs was completed for the three states: new, conditioned and aged. This is represented in a Ce-t* plots, which show a large offset between new and aged samples.

Indexing (document details)
Advisor: Allen, Jeffrey S.
Commitee: Li, Wenzhen, Tajiri, Kazuya
School: Michigan Technological University
Department: Mechanical Engineering-Engineering Mechanics
School Location: United States -- Michigan
Source: MAI 52/05M(E), Masters Abstracts International
Subjects: Mechanical engineering
Keywords: Catalyst layer, Pem fuel cells, Percolation, Ptl
Publication Number: 1552771
ISBN: 978-1-303-73693-3
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