TY - JOUR
T1 - Optimization of La0.75Sr0.25Cr0.5Mn0.5O3-δ-Ce0.8Sm0.2O1.9 compositionally graded anode functional layer
AU - He, Shoucheng
AU - Dai, Hailu
AU - Cai, Guifan
AU - Chen, Han
AU - Guo, Lucun
N1 - Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2015/1/10
Y1 - 2015/1/10
N2 - A new type of anode structure, composed of a group of La0.75Sr0.25Cr0.5Mn0.5O3-δ-Ce0.8Sm0.2O1.9 (LSCM-SDC) compositionally graded anode functional layers (CGAFL) and a porous SDC interlayer adjacent to the electrolyte, was fabricated by screen printing method for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The results of electrochemical impedance spectroscopy (EIS) show that the polarization resistance decreased from 3.49 Ω cm2 to 1.85 Ω cm2 at 800°C in H2 after introducing CGAFL. In addition, the polarization resistance further decreased to 0.30 Ω cm2 when the CGAFL combined with the SDC interlayer, demonstrating a reduction by factors of 11.6 and 6.2, respectively, compared with the non-graded cell and the CGAFL cell without the SDC interlayer. The single cell displayed that the CGAFL combined with the SDC interlayer increased the maximum power density by factors of 2.9 and 2.1, respectively, at 800°C. These results indicated that the CGAFL combined with the SDC interlayer may be a potential electrode structure for design optimization.
AB - A new type of anode structure, composed of a group of La0.75Sr0.25Cr0.5Mn0.5O3-δ-Ce0.8Sm0.2O1.9 (LSCM-SDC) compositionally graded anode functional layers (CGAFL) and a porous SDC interlayer adjacent to the electrolyte, was fabricated by screen printing method for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The results of electrochemical impedance spectroscopy (EIS) show that the polarization resistance decreased from 3.49 Ω cm2 to 1.85 Ω cm2 at 800°C in H2 after introducing CGAFL. In addition, the polarization resistance further decreased to 0.30 Ω cm2 when the CGAFL combined with the SDC interlayer, demonstrating a reduction by factors of 11.6 and 6.2, respectively, compared with the non-graded cell and the CGAFL cell without the SDC interlayer. The single cell displayed that the CGAFL combined with the SDC interlayer increased the maximum power density by factors of 2.9 and 2.1, respectively, at 800°C. These results indicated that the CGAFL combined with the SDC interlayer may be a potential electrode structure for design optimization.
KW - Ceria-based interlayer
KW - Compositionally graded anode
KW - Electrochemical impedance spectroscopy
KW - Single cell performance
KW - Solid oxide fuel cell
UR - http://www.scopus.com/inward/record.url?scp=84912124918&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2014.11.081
DO - 10.1016/j.electacta.2014.11.081
M3 - 文章
AN - SCOPUS:84912124918
SN - 0013-4686
VL - 152
SP - 155
EP - 160
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -