TY - JOUR
T1 - Chemical compatibility of Al2O3-added glass sealant with bare and coated interconnect in oxidizing and reducing environments
AU - Guo, Mengyuan
AU - Hao, Wangshu
AU - Liu, Xiaoxu
AU - Jin, Yiqian
AU - Yue, Xiangling
AU - Yang, Zhibin
AU - Peng, Suping
N1 - Funding: The authors are grateful for the support of the National Key Research and Development Program of China (2021YFE0107200), the National Natural Science Foundation of China (52072405). We also gratefully thank the China Scholarship Council (CSC, 202006430068) for supporting Mengyuan Guo to study at the University of St Andrews as a visiting Ph.D. student.
PY - 2023/9/1
Y1 - 2023/9/1
N2 - Chemical compatibility in oxidizing and reducing environments between sealants and interconnects for planar solid oxide fuel cells (SOFC) are investigated. (Co,Mn)3O4, Co-Mn, and Al coatings were prepared on the FeCr-based ferritic-stainless-steel (SUS430). The (Co,Mn)3O4 coating exhibited water vapor bubble formation at the outer sealing edges when exposed to H2, indicating reactions between the coating and sealant. Co-Mn metal coating was found readily oxidized in an oxidizing environment. The glass with 5 wt% Al2O3 addition helped mitigate the Cr diffusion into sealant based on bare SUS430 substrate. Moreover, the Al metal layer effectively blocked the diffusion of Cr into the sealant at the interface and environment for 100 h, with a thickness of only 1 µm. At the constant discharge current of 24 A, the voltage is stabilized at about 4.2 V for 48 h using H2 as fuel gas in 5-cell stack.
AB - Chemical compatibility in oxidizing and reducing environments between sealants and interconnects for planar solid oxide fuel cells (SOFC) are investigated. (Co,Mn)3O4, Co-Mn, and Al coatings were prepared on the FeCr-based ferritic-stainless-steel (SUS430). The (Co,Mn)3O4 coating exhibited water vapor bubble formation at the outer sealing edges when exposed to H2, indicating reactions between the coating and sealant. Co-Mn metal coating was found readily oxidized in an oxidizing environment. The glass with 5 wt% Al2O3 addition helped mitigate the Cr diffusion into sealant based on bare SUS430 substrate. Moreover, the Al metal layer effectively blocked the diffusion of Cr into the sealant at the interface and environment for 100 h, with a thickness of only 1 µm. At the constant discharge current of 24 A, the voltage is stabilized at about 4.2 V for 48 h using H2 as fuel gas in 5-cell stack.
KW - Solid oxide fuel cell (SOFC)
KW - Glass sealant
KW - Oxidizing and reducing atmospheres
KW - Chemical compatibility
KW - Interface
U2 - 10.1016/j.jeurceramsoc.2023.05.002
DO - 10.1016/j.jeurceramsoc.2023.05.002
M3 - Article
SN - 0955-2219
VL - 43
SP - 5288
EP - 5297
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -