SOFC ohmic resistance reduction by HCl-induced removal of manganese at the anode/electrolyte interface

O. A. Marina, L. R. Pederson, E. C. Thomsen, D. J. Edwards, C. A. Coyle, C. N. Cramer

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Abstract

The ohmic resistance of anode-supported solid oxide fuel cells (SOFCs) having a manganese-based cathode was lowered when operated in synthetic coal gas containing hydrogen chloride. This effect was not observed for cells with cathodes that did not contain manganese. Substantial amounts of Mn were found throughout the grain boundaries of the 8 mol % yttria-stabilized zirconia electrolyte. Exposure to HCl partially removed Mn near the anode/electrolyte interface, presumably by volatilization as MnCl2 (g). This work suggests that one of the underlying causes of the higher than expected electrolyte resistance in anode-supported SOFCs involves the formation of a Mn-containing insulating layer at grain boundaries.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume13
Issue number6
DOIs
Publication statusPublished - 2010
Externally publishedYes

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ASJC Scopus subject areas

  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

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