Importance of pressure gradient in solid oxide fuel cell electrodes for modeling study

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

20 Scopus Citations
View graph of relations



Original languageEnglish
Pages (from-to)668-673
Journal / PublicationJournal of Power Sources
Issue number2
Publication statusPublished - 1 Sep 2008
Externally publishedYes


The pressure gradients in the electrodes of a solid oxide fuel cell (SOFC) are frequently neglected without any justification in calculating the concentration overpotentials of the SOFC electrodes in modeling studies. In this short communication, a comparative study has been conducted to study the effect of pressure gradients on mass transfer and the resulting concentration overpotentials of an SOFC running on methane (CR4) fuel. It is found that the pressure gradients in both anode and cathode are significant in the fuel cell electrochemical activities. Neglecting the anode pressure gradient in the calculation can lead to underestimation of the concentration overpotential by about 20% at a typical current density of 5000 A m-2 and at a temperature of 1073 K. The deviation can be even larger at a higher temperature. At the cathode, neglecting the pressure gradient can result in overestimation of the concentration overpotential by about 10% under typical working conditions. © 2008 Elsevier B.V. All rights reserved.

Research Area(s)

  • Electrochemical model, Mass transfer, Methane steam reforming (MSR), Porous media, SOFC, Water gas shift (WGS)