A methodology for the estimation of proton diffusivity in proton exchange membranes

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The diffusivity of hydrogen protons is a crucial parameter affecting the performance of the Proton Exchange Membrane Fuel Cell (PEMFC). The analysis presented in this paper leads to a methodology for determining the diffusivity of hydrogen protons in a Proton Exchange Membrane (PEM). In this method, a simulation is performed to obtain a correlation between the value of diffusivity and the time to reach the steady state in proton concentration profiles within the PEM. The proton diffusion is assumed to follow Fick's law, which assumes a concentration independent diffusivity. In addition to the simulation, an experiment, which monitors the variation of voltage output of a PEMFC, is performed. The experimentation determines relationship between the voltage output and the time required for the voltage output to reach steady-state. A correlation with the simulated steady state analyses from the model determines the diffusivity of the PEM. Numerical and experimental results are presented for a membrane available commercially.

Original languageEnglish
Title of host publicationSAMPE '07
Subtitle of host publicationM and P - From Coast to Coast and Around the World; Conference Proceedings
StatePublished - 2007
EventSAMPE '07: M and P - From Coast to Coast and Around the World - Baltimore, MD, United States
Duration: 3 Jun 20077 Jun 2007

Publication series

NameInternational SAMPE Symposium and Exhibition (Proceedings)
Volume52
ISSN (Print)0891-0138

Conference

ConferenceSAMPE '07: M and P - From Coast to Coast and Around the World
Country/TerritoryUnited States
CityBaltimore, MD
Period3/06/077/06/07

Keywords

  • Diffusion model and experimentation
  • Proton diffusion
  • Proton exchange membrane

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