Microstructure, property and processing relation in gradient porous cathode of solid oxide fuel cells using statistical continuum mechanics

Hoda Amani Hamedani, Majid Baniassadi, M. Khaleel, Xin Sun, Said Ahzi, D.ruch, H. Garmestani

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18 Citations (Scopus)

Abstract

This paper investigates the relation between microstructure, macroscopic transport properties, and fabrication processing for a gradient porous cathode of solid oxide fuel cells (SOFCs). Functionally graded porous cathode with smooth variations in pore size is composed of lanthanum strontium manganite (LSM) fabricated on yttria stabilized zirconia (YSZ) electrolyte substrate using a multi-step spray pyrolysis (SP) technique at various deposition conditions. Two-dimensional (2D) serial-sections of the gradient porous microstructure obtained by FIB-SEM are fully characterized using statistical correlation functions. Results of statistical analysis of the microstructures revealed that the SP processing technique is capable of generating statistically identical and homogeneous microstructures with smooth gradient in pore size resulting from changing the processing parameters. Strong contrast statistical approach is also used to predict the in-plane temperature dependent effective electrical conductivity of the gradient porous cathode and the results are compared to the experimental data.

Original languageEnglish
Pages (from-to)6325-6331
Number of pages7
JournalJournal of Power Sources
Volume196
Issue number15
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

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Keywords

  • Electrical conductivity
  • Functionally graded materials (FGM)
  • Porous cathode
  • Probability functions
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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