Justifying the significance of Knudsen diffusion in solid oxide fuel cells

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

17 Scopus Citations
View graph of relations

Author(s)

  • Fei Yang
  • Jianmin Gu
  • Luhan Ye
  • Zuoxiang Zhang
  • Gaofeng Rao
  • Yachun Liang
  • Kechun Wen
  • John B. Goodenough
  • Weidong He

Detail(s)

Original languageEnglish
Pages (from-to)242-246
Journal / PublicationEnergy
Volume95
Online published30 Dec 2015
Publication statusPublished - 15 Jan 2016

Abstract

Developing an appropriate diffusion mechanism to analyze the gas transport in porous electrodes of SOFCs (solid oxide fuel cells), has been a crucial step towards analyzing accurately the cell performance. In this report, the errors in evaluating the gas diffusivity, limiting current density and concentration polarization, are calculated quantitatively by taking bulk diffusion and the previously-overlooked Knudsen diffusion into account. In particular, this work analyzes the deviation between ignoring and considering the Knudsen diffusion of hydrogen transport in SOFC anodes. The study facilitates the rational pre-evaluation of micro- and nanoscale materials prior to assembly into SOFCs.

Research Area(s)

  • Anode, Concentration polarization, Gas diffusion, Limiting current density, Solid oxide fuel cells

Citation Format(s)

Justifying the significance of Knudsen diffusion in solid oxide fuel cells. / Yang, Fei; Gu, Jianmin; Ye, Luhan; Zhang, Zuoxiang; Rao, Gaofeng; Liang, Yachun; Wen, Kechun; Zhao, Jiyun; Goodenough, John B.; He, Weidong.

In: Energy, Vol. 95, 15.01.2016, p. 242-246.

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