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Oxygen Dissociation and Interfacial Transfer Rate on Performance of SOFCs with Metal‐Added (LaSr)(CoFe)O 3 ‐(Ce,Gd)O 2 – δ Cathodes
Author(s) -
Huang T.J.,
Chou C.L.
Publication year - 2010
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.201000028
Subject(s) - materials science , cathode , yttria stabilized zirconia , solid oxide fuel cell , electrolyte , anode , oxide , calcination , dissociation (chemistry) , metal , chemical engineering , cubic zirconia , oxygen , inorganic chemistry , electrode , composite material , metallurgy , ceramic , catalysis , chemistry , organic chemistry , engineering , biochemistry
A solid oxide fuel cell (SOFC) unit is constructed with Ni‐Ce 0.9 Gd 0.1 O 2 – δ (GDC) as the anode, yttria‐stabilised zirconia (YSZ) as the electrolyte and Pt, Ag or Cu‐added La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3 – δ (LSCF)–GDC as the cathode. The current–voltage measurements are performed at 800 °C. Cu addition leads to best SOFC performance. LSCF–GDC–Cu is better than LSCF–GDC and much better than GDC as the material of the cathode interlayer. Cu content of 2 wt.‐% leads to best SOFC performance. A cathode functional layer calcined at 800 °C is better than that calcined at higher temperature. Metal addition increases the O 2 dissociation reactivity but results in an interfacial resistance for O transfer. A balance between the rates of O 2 dissociation and interfacial O transfer is needed for best SOFC performance.