Mass Transfer in Microporous Layers for Polymer Electrolyte Fuel Cells Analyzed with Pore Network Modeling

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The application of a microporous layer (MPL) to the catalyst layer (CL) side of the gas diffusion layer substrate of a polymer electrolyte fuel cell (PEFC, PEMFC) is effective to mitigate liquid water accumulation at the CL that inhibits oxygen transport to the cathode CL (Flooding). To elucidate the effects of two-phase flow on the oxygen transport in an MPL for its optimized designs, we have modeled three-dimensional porous structures of in-house hydrophobic MPLs with pore network models (PNMs) for convective air permeation and oxygen diffusion with liquid water saturation. Pore diameter distributions derived by a focused ion beam scanning electron microscope (FIB-SEM) are used to construct the PNMs. Oxygen diffusion measurements by using gas chromatography with changing wetting liquid saturation, as well as air permeation measurements, validate the PNMs.

Original languageEnglish
Title of host publication240th ECS Meeting - Polymer Electrolyte Fuel Cells and Electrolyzers 21 (PEFC and E 21)
PublisherIOP Publishing Ltd.
Pages129-135
Number of pages7
Edition8
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2021
Event240th ECS Meeting - Orlando, United States
Duration: Oct 10 2021Oct 14 2021

Publication series

NameECS Transactions
Number8
Volume104
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference240th ECS Meeting
Country/TerritoryUnited States
CityOrlando
Period10/10/2110/14/21

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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