Detailed dynamic Solid Oxide Fuel Cell modeling for electrochemical impedance spectra simulation

2010 ◽  
Vol 195 (16) ◽  
pp. 5320-5339 ◽  
Author(s):  
Ph. Hofmann ◽  
K.D. Panopoulos
2019 ◽  
Vol 35 (5) ◽  
pp. 509-516 ◽  
Author(s):  
Wangying SHI ◽  
◽  
Chuan JIA ◽  
Yongliang ZHANG ◽  
Zewei Lü ◽  
...  

2011 ◽  
Vol 196 (18) ◽  
pp. 7519-7532 ◽  
Author(s):  
H. Wen ◽  
J.C. Ordonez ◽  
J.V.C. Vargas

Author(s):  
Jarosław Milewski ◽  
Konrad Świrski ◽  
Massimo Santarelli ◽  
Pierluigi Leone

2009 ◽  
Vol 56 (1) ◽  
pp. 139-148 ◽  
Author(s):  
A. Gebregergis ◽  
P. Pillay ◽  
D. Bhattacharyya ◽  
R. Rengaswemy

2015 ◽  
Vol 182 ◽  
pp. 289-305 ◽  
Author(s):  
Chengsheng Ni ◽  
John T. S. Irvine

For an efficient high-temperature reversible solid oxide fuel cell (RSOFC), the oxygen electrode should be highly active for the conversion between oxygen anions and oxygen gas. CaMnO3−δ (CM) is a perovskite that can be readily reduced with the formation of Mn3+ giving rise to oxygen defective phases. CM is examined here as the oxygen electrode for a RSOFC. CaMn0.9Nb0.1O3−δ (CMN) with Nb doping shows superior electric conductivity (125 S cm−1 at 700 °C) compared with CM (1–5 S cm−1 at 700 °C) in air which is also examined for comparison. X-ray diffraction (XRD) data show that CM and CMN are compatible with the widely used yttria-stabilized zirconia (YSZ) electrolyte up to 950 °C. Both materials show a thermal expansion coefficient (TEC) close to 10.8–10.9 ppm K−1 in the temperature range between 100–750 °C, compatible with that of YSZ. Polarization curves and electrochemical impedance spectra for both fuel cell and steam electrolysis modes were investigated at 700 °C, showing that CM presented a polarization resistance of 0.059 Ω cm2 under a cathodic bias of −0.4 V while CMN gave a polarization resistance of 0.081 Ω cm2 under an anodic bias of 0.4 V. The phase stability up to 900 °C of these materials was investigated with thermogravimetric analysis (TGA) and variable temperature XRD.


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