TY - JOUR
T1 - The Ca element effect on the enhancement performance of Sr2Fe1.5Mo0.5O6−δ perovskite as cathode for intermediate-temperature solid oxide fuel cells
AU - Qiao, Jinshuo
AU - Chen, Wenjun
AU - Wang, Wenyi
AU - Wang, Zhenhua
AU - Sun, Wang
AU - Zhang, Jing
AU - Sun, Kening
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2−xCaxFe1.5Mo0.5O6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (Rp), the highest conductivity and a maximum power density of 1.26 W cm−2 at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.
AB - In this paper, the partial substitution of atomic elements from the A site of a perovskite is investigated in order to develop cathode materials for solid oxide fuel cell (SOFC) applications. Herein, Sr2−xCaxFe1.5Mo0.5O6−δ (SCFM), compounds were investigated by characterizing structural properties, chemical compatibility, electrical properties, electrochemical performance and stability. Thermal expansion coefficients were found to decrease when increasing the Ca content. X-ray photoelectron spectroscopy analysis suggests that Ca doping significantly affects the Fe2+/Fe3+ and Mo6+/Mo5+ ratios. For a doping level of x = 0.4, the sample showed the lowest interface polarization (Rp), the highest conductivity and a maximum power density of 1.26 W cm−2 at 800 °C. These results suggest that SCFM cathode materials are excellent candidates for intermediate temperature solid oxide fuel cells applications.
KW - Ca substitution Cathode
KW - Electrochemical properties
KW - Solid oxide fuel cells
UR - http://www.scopus.com/inward/record.url?scp=84990985866&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2016.09.082
DO - 10.1016/j.jpowsour.2016.09.082
M3 - Article
AN - SCOPUS:84990985866
SN - 0378-7753
VL - 331
SP - 400
EP - 407
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
