TY - JOUR
T1 - A novel Ba0.6Sr0.4Co0.9Nb0.1O3-δ cathode for protonic solid-oxide fuel cells
AU - Lin, Ye
AU - Ran, Ran
AU - Chen, Dengjie
AU - Shao, Zongping
PY - 2010/8/1
Y1 - 2010/8/1
N2 - Ba0.6Sr0.4Co0.9Nb0.1O3-δ (BSCN), originated from SrCo0.9Nb0.1O3-δ (SCN), is investigated as a cathode material in a protonic solid-oxide fuel cell (SOFC-H+) with a BaZr0.1Ce0.7Y0.2O3 (BZCY) electrolyte. The surface-exchange and bulk-diffusion properties, phase reaction with the electrolyte, electrochemical activity for oxygen reduction, and performance in the real fuel cell condition of SCN and BSCN electrodes are comparatively studied by conductivity relaxation, XRD, EIS and I-V polarization characterizations. Much better performance is found for BSCN than SCN. Furthermore, water has a positive effect on oxygen reduction over BSCN while it has the opposite effect with SCN. A peak power density of 630 mW cm-2 at 700 °C is achieved for a thin-film BZCY electrolyte cell with a BSCN cathode compared to only 287 mW cm-2 for a similar cell with an SCN cathode. The results highly recommend BSCN as a potential cathode material for protonic SOFCs. Crown
AB - Ba0.6Sr0.4Co0.9Nb0.1O3-δ (BSCN), originated from SrCo0.9Nb0.1O3-δ (SCN), is investigated as a cathode material in a protonic solid-oxide fuel cell (SOFC-H+) with a BaZr0.1Ce0.7Y0.2O3 (BZCY) electrolyte. The surface-exchange and bulk-diffusion properties, phase reaction with the electrolyte, electrochemical activity for oxygen reduction, and performance in the real fuel cell condition of SCN and BSCN electrodes are comparatively studied by conductivity relaxation, XRD, EIS and I-V polarization characterizations. Much better performance is found for BSCN than SCN. Furthermore, water has a positive effect on oxygen reduction over BSCN while it has the opposite effect with SCN. A peak power density of 630 mW cm-2 at 700 °C is achieved for a thin-film BZCY electrolyte cell with a BSCN cathode compared to only 287 mW cm-2 for a similar cell with an SCN cathode. The results highly recommend BSCN as a potential cathode material for protonic SOFCs. Crown
KW - Cathode
KW - Perovskite
KW - Proton
KW - Solid-oxide fuel cells
UR - http://www.scopus.com/inward/record.url?scp=77950301028&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2010.02.062
DO - 10.1016/j.jpowsour.2010.02.062
M3 - 文章
AN - SCOPUS:77950301028
SN - 0378-7753
VL - 195
SP - 4700
EP - 4703
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 15
ER -
