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Break Down of Losses in Thin Electrolyte SOFCs
Author(s) -
Barfod R.,
Hagen A.,
Ramousse S.,
Hendriksen P. V.,
Mogensen M.
Publication year - 2006
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.200500113
Subject(s) - electrolyte , anode , cathode , cermet , materials science , composite number , electrode , yttria stabilized zirconia , analytical chemistry (journal) , chemical engineering , composite material , chemistry , chromatography , ceramic , cubic zirconia , engineering
The contributions of the individual components of the cell (anode, cathode, and electrolyte) to the cell resistance were determined experimentally, directly from impedance spectra obtained from a full cell. It was an anode supported thin electrolyte cell, consisting of a YSZ electrolyte, a Ni/YSZ cermet anode, and a LSM composite cathode. Additional, qualitative information was obtained using symmetric cells with LSM composite electrodes. The investigations were carried out in the temperature interval from 700 to 850 °C. The electrolyte and anode activation energies obtained were 0.9 and 1.1 eV, respectively, which is in relatively good agreement with literature values. The anode resistance was 0.24 Ω cm 2 and the cathode resistance was 0.58 Ω cm 2 at 700 °C, corresponding to 23% and 56% of the total resistance, respectively.