Transport characteristics of water and proton in membrane of PEM fuel cells

Hong Sun, Liejin Guo, Hongtan Liu, Guangsheng Zhang

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Water and proton transport together with water content in proton exchange membrane showed significant effects on the performance of PEM fuel cells. A steady state two-phase flow model is presented to study water transport and water content in the membrane as well as the relation between water content and proton transport resistance. This model couples the conservation of mass, momentum and species equations with transport equation in the membrane. Simulation results indicated that the polarization curves agreed well with experimental data. For the same current density, coefficients of electro-osmotic drag, back diffusion and hydraulic permeation with water content in the membrane increased gradually along the gas flow direction, while net water transport coefficient arid proton transport resistance decreased as operating pressure increased; at the same time electro-osmotic drag, back diffusion, hydraulic permeation and net water transport coefficients and water content in the membrane increased rapidly, while proton transport resistance decreased, which improved the performance of PEM fuel cells.

Original languageEnglish (US)
Pages (from-to)1081-1085
Number of pages5
JournalHuagong Xuebao/Journal of Chemical Industry and Engineering (China)
Volume56
Issue number6
StatePublished - Jun 1 2005
Externally publishedYes

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Keywords

  • Fuel cell (FC)
  • Mathematical model
  • Proton exchange membrane (PEM)
  • Water transport

ASJC Scopus subject areas

  • Process Chemistry and Technology
  • Filtration and Separation

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