Review and analysis of characterization methods and ionic conductivities for low-temperature solid oxide fuel cells (LT-SOFC)

Janne Patakangas*, Ying Ma, Yifu Jing, Peter Lund

*Corresponding author for this work

Research output: Contribution to journalLiterature review

75 Citations (Scopus)

Abstract

In recent years, doped ceria/carbonate composite is one of the most researched low-temperature SOFC electrolyte. Its ionic conductivity, which strongly influences the performance of the fuel cell, can be measured with several different methods including EIS, constant current and product analysis measurements. The conductivities of similar materials measured under similar conditions seem to vary quite much, which could be partly explained by the sample preparation affecting the properties of the electrolyte. However, we found that the used measurement approach may impose even a larger uncertainty. Therefore, results from different conductivity measurement techniques may not be comparable. In this article, conductivities of doped ceria/carbonate composites and measurement techniques employed in recent articles have been reviewed. Pros and cons of the different measurement methods are analyzed and discrepancies found in the measured conductivity values are explained. Finally, recommendations on conductivity measurements of LT-SOFC composite electrolytes are given. (C) 2014 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)315-331
Number of pages17
JournalJournal of Power Sources
Volume263
DOIs
Publication statusPublished - 1 Oct 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • LT-SOFC
  • Ionic conductivity
  • Doped ceria/carbonate electrolyte
  • Electrochemical impedance spectroscopy
  • Constant current measurement
  • Product analysis
  • CERIA-CARBONATE COMPOSITE
  • SDC/NA2CO3 NANOCOMPOSITE ELECTROLYTE
  • SAMARIA-DOPED CERIA
  • ELECTRICAL-PROPERTIES
  • IMPEDANCE SPECTROSCOPY
  • WAGNER POLARIZATION
  • IT-SOFC
  • CONDUCTORS
  • PROTON
  • SDC

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