Journal article
Computational and Experimental Analysis of Water Transport at Component Interfaces in Polymer Electrolyte Fuel Cells
Journal of the Electrochemical Society, v 161(11), pp F3091-F3103
01 Jan 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This study investigated the influence of micro-porous layer (MPL) surface topology on the polymer electrolyte fuel cell (PEFC) performance through, both experimental characterization and computational modeling. Studies were performed considering MPLs with varying degrees of surface roughness and crack size/density. In two instances, we systematically varied the topology by introducing water transport channels into the MPL. We experimentally observed that transport channels consistently increased the maximum current density. To investigate the reasons for the performance improvement, a two-dimensional, multi-phase, multi-fluid model was formulated with discrete domains for morphological features, including liquid water retention within interfacial voids and cracks. The model results provide evidence that the performance improvement with the modified MPLs is due to improved liquid water removal from the catalyst layer (CL). Liquid water moves laterally through the CL vertical bar MPL interface until it reaches the milled lines and from there it is removed in through-plane direction through the fibrous diffusion media (DM) and into the gas channel. A key outcome of this work is that we demonstrate a CL vertical bar MPL interface model that can accurately capture the effects of varying MPL surface morphology on PEFC performance and can be used in the design of new, optimized CL vertical bar MPL interface morphologies. (C) 2014 The Electrochemical Society. All rights reserved.
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Details
- Title
- Computational and Experimental Analysis of Water Transport at Component Interfaces in Polymer Electrolyte Fuel Cells
- Creators
- I. V. Zenyuk - Carnegie Mellon UniversityR. Taspinar - Drexel UniversityA. R. Kalidindi - Drexel UniversityE. C. Kumbur - Drexel UniversityS. Litster - Carnegie Mellon University
- Publication Details
- Journal of the Electrochemical Society, v 161(11), pp F3091-F3103
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 13
- Grant note
- 1066623 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000343785600016
- Scopus ID
- 2-s2.0-84923294306
- Other Identifier
- 991019169682304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films