Feasibility study of using microfluidic platforms for visualizing bubble flows in electrolyzer gas diffusion layers

In this study, microfluidic platforms were used to visualize air bubble transport in two-dimensional (2D) representations of gas diffusion layers (GDLs) to gain insight into how the geometric features of the GDL impact multiphase flow in polymer electrolyte membrane (PEM) electrolyzers. Two-dimensio...

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Bibliographic Details
Published in:Journal of power sources 2014-07, Vol.258, p.142-149
Main Authors: ARBABI, F, KALANTARIAN, A, ABOUATALLAH, R, WANG, R, WALLACE, J. S, BAZYLAK, A
Format: Article
Language:English
Subjects:
Bubbles
Channels
Chemistry
Electrochemistry
Exact sciences and technology
Foams
Gas diffusion
General and physical chemistry
Microfluidics
Platforms
Porosity
Two dimensional
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Summary:In this study, microfluidic platforms were used to visualize air bubble transport in two-dimensional (2D) representations of gas diffusion layers (GDLs) to gain insight into how the geometric features of the GDL impact multiphase flow in polymer electrolyte membrane (PEM) electrolyzers. Two-dimensional porous networks were designed using volumetric pore space information, including average porosity and average throat size obtained from micro-computed tomography (micro CT) visualizations. Microfluidic chips were fabricated to represent felt, sintered powder, and foam GDLs and used to simulate the transfer of oxygen bubbles generated at the catalyst layer, through the GDL towards the flow channels of a PEM electrolyzer. The results of this work indicate that the use of microfluidic platforms for evaluating PEM electrolyzer GDLs is highly promising.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.02.042