First principles study of Cr poisoning in solid oxide fuel cell cathodes: Application to (La,Sr) CoO3

Academic Article

Abstract

  • © 2017 Elsevier B.V. Solid oxide fuel cell (SOFC) systems provide efficient and clean power. Chromium poisoning is known to deteriorate the performance of the SOFC cathodes such as La1−xSrxCoO3 (LSCO) due to the formation of undesired products. We identify the reaction products when LSCO is in a CrO3 and O2 atmosphere using first principle thermodynamics, with the assumption that gas-phase CrO3 is the Cr source. Our results correctly identify SrCrO4 as the primary Cr poisoning product as observed in experiments and also provides temperature-pressure regimes under which Cr poisoning effects may be avoided.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Krishnan S; Mahapatra MK; Singh P; Ramprasad R
  • Start Page

  • 6
  • End Page

  • 9
  • Volume

  • 137