Break‐down of Losses in High Performing Metal‐Supported Solid Oxide Fuel Cells

A. Kromp, Jimmi Nielsen, Peter Blennow Tullmar, Trine Klemensø, A. Weber

Research output: Contribution to journalJournal articleResearchpeer-review


A detailed electrochemical impedance study with the help of the distribution of relaxation times (DRT) method and a subsequent CNLS‐fit enabled us to quantitatively analyze the different loss contributions in the cell: the ohmic resistance and the polarization processes related to the gas diffusion in the metal support, the electrochemical fuel oxidation at the anode and the oxygen reduction in the mixed ionic electronic conducting cathode. An additional process with a rather high relaxation frequency was attributed to the formation of insulating interlayers at the cathode/electrolyte‐interface. Based on these results, selective measures to improve performance and stability, such as (i) PVD‐deposited CGO buffer layer preventing solid state reaction between cathode and the zirconia‐based electrolyte, (ii) LSC‐CGO based in‐situ sintered cathodes and (iii) reduced corrosion of the metal support, were adopted and validated.
Original languageEnglish
JournalFuel Cells
Issue number4
Pages (from-to)598-604
Publication statusPublished - 2013
Event10th European SOFC Forum - Kultur- und Kongresszentrum Luzern, Luzern, Switzerland
Duration: 26 Jun 201229 Jun 2012


Conference10th European SOFC Forum
LocationKultur- und Kongresszentrum Luzern


  • CNLS-Fit
  • DRT
  • Electrochemical impedance spectroscopy
  • Fuel Cells
  • Metal-supported cells
  • SOFC


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