TY - JOUR
T1 - Effect of Co doping on the properties of Sr0.8Ce0.2MnO3-δ cathode for intermediate-temperature solid-oxide fuel cells
AU - Gu, Haitao
AU - Chen, Han
AU - Gao, Ling
AU - Zheng, Yifeng
AU - Zhu, Xiaofang
AU - Guo, Lucun
PY - 2008/9
Y1 - 2008/9
N2 - The effect of the Co doping on the structure, electrical conductivity and electrochemical properties of Sr0.8Ce0.2MnO3-δ was investigated. The Co doping decreased the sintering temperature by about 100 °C and cubic structure was synthesized for Sr0.8Ce0.2Mn0.8Co0.2O3-δ. The electrical conductivity of Sr0.8Ce0.2Mn0.8Co0.2O3-δ reached 102 S cm-1 at 700 °C, which was sufficient to provide low ohmic losses at the cathode. In comparison with Sr0.8Ce0.2MnO3-δ, the area-specific resistance of Sr0.8Ce0.2Mn0.8Co0.2O3-δ was 0.10 Ω cm2 at 750 °C, which was about 20 times lower than that of Sr0.8Ce0.2MnO3-δ. While the exchange current density i0 of Sr0.8Ce0.2Mn0.8Co0.2O3-δ was 0.49 A cm-2 at 800 °C, that for Sr0.8Ce0.2MnO3-δ was 0.11 A cm-2. The results show that the Sr0.8Ce0.2Mn0.8Co0.2O3-δ cathode had high catalytic activity for oxygen reduction reaction in the temperature range of 700-800 °C. Crown
AB - The effect of the Co doping on the structure, electrical conductivity and electrochemical properties of Sr0.8Ce0.2MnO3-δ was investigated. The Co doping decreased the sintering temperature by about 100 °C and cubic structure was synthesized for Sr0.8Ce0.2Mn0.8Co0.2O3-δ. The electrical conductivity of Sr0.8Ce0.2Mn0.8Co0.2O3-δ reached 102 S cm-1 at 700 °C, which was sufficient to provide low ohmic losses at the cathode. In comparison with Sr0.8Ce0.2MnO3-δ, the area-specific resistance of Sr0.8Ce0.2Mn0.8Co0.2O3-δ was 0.10 Ω cm2 at 750 °C, which was about 20 times lower than that of Sr0.8Ce0.2MnO3-δ. While the exchange current density i0 of Sr0.8Ce0.2Mn0.8Co0.2O3-δ was 0.49 A cm-2 at 800 °C, that for Sr0.8Ce0.2MnO3-δ was 0.11 A cm-2. The results show that the Sr0.8Ce0.2Mn0.8Co0.2O3-δ cathode had high catalytic activity for oxygen reduction reaction in the temperature range of 700-800 °C. Crown
KW - Cathode
KW - Cathodic polarization
KW - Electrochemical impedance spectroscopy
KW - Exchange current density
KW - Oxygen reduction reaction
KW - Solid-oxide fuel cells
UR - http://www.scopus.com/inward/record.url?scp=50849089019&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2008.06.025
DO - 10.1016/j.ijhydene.2008.06.025
M3 - 文章
AN - SCOPUS:50849089019
SN - 0360-3199
VL - 33
SP - 4681
EP - 4688
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 17
ER -
