TY - JOUR
T1 - Preparation and characterization of Nd2-xSrxCoO 4+δ cathodes for intermediate-temperature solid oxide fuel cell
AU - Cao, Yue
AU - Gu, Haitao
AU - Chen, Han
AU - Zheng, Yifeng
AU - Zhou, Ming
AU - Guo, Lucun
PY - 2010/6
Y1 - 2010/6
N2 - K2NiF4-type structural Nd2-xSr xCoO4+δ (x = 0.8, 1.0, 1.2) was synthesized and evaluated as cathodes for intermediate-temperature solid oxide fuel cell (IT-SOFC). The crystal structure, thermal expansion, electrical conductivity and electrochemical properties were investigated by X-ray diffraction, dilatometry, DC four-probe method, AC impedance and polarization techniques. It is found that the electrochemical properties were remarkably improved with the increasing of Sr in the experiment range. Nd0.8Sr1.2CoO 4+δ showed the highest electrical conductivity of 212 S cm -1 at 800 °C, the lowest polarization resistance and cathodic overpotential, 0.40 Ωcm2 at 700 °C and 35.6 mV at a current density of 0.1 A cm-2 at 700 °C, respectively. The chemical compatibility experiment revealed that Nd0.8Sr1.2CoO 4+δ cathode was chemically stable with the SDC electrolyte. The thermal expansion coefficient also increased with the Sr content.
AB - K2NiF4-type structural Nd2-xSr xCoO4+δ (x = 0.8, 1.0, 1.2) was synthesized and evaluated as cathodes for intermediate-temperature solid oxide fuel cell (IT-SOFC). The crystal structure, thermal expansion, electrical conductivity and electrochemical properties were investigated by X-ray diffraction, dilatometry, DC four-probe method, AC impedance and polarization techniques. It is found that the electrochemical properties were remarkably improved with the increasing of Sr in the experiment range. Nd0.8Sr1.2CoO 4+δ showed the highest electrical conductivity of 212 S cm -1 at 800 °C, the lowest polarization resistance and cathodic overpotential, 0.40 Ωcm2 at 700 °C and 35.6 mV at a current density of 0.1 A cm-2 at 700 °C, respectively. The chemical compatibility experiment revealed that Nd0.8Sr1.2CoO 4+δ cathode was chemically stable with the SDC electrolyte. The thermal expansion coefficient also increased with the Sr content.
KW - Cathode
KW - Electrical conductivity
KW - Electrochemical properties
KW - Solid oxide fuel cell
KW - Thermal expansion
UR - http://www.scopus.com/inward/record.url?scp=77955173246&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2010.03.046
DO - 10.1016/j.ijhydene.2010.03.046
M3 - 文章
AN - SCOPUS:77955173246
SN - 0360-3199
VL - 35
SP - 5594
EP - 5600
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 11
ER -
