TY - GEN
T1 - Performance of anode-supported proton-conducting solid oxide fuel cells with lanthanum-based thin bilayer electrolyte
AU - Matsuo, H.
AU - Kojo, G.
AU - Sakata, K.
AU - Matsuzaki, Y.
AU - Otomo, J.
N1 - Funding Information:
This work was supported by COI STREAM of the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and MEXT KAKENHI 17H00801. XRD measurements were performed using the facilities of the Institute of Solid State Physics, the University of Tokyo.
Publisher Copyright:
© The Electrochemical Society.
PY - 2019
Y1 - 2019
N2 - La-doped ceria (LaxCe4−xO8−x/2: LDC) is one of the promising proton-conducting oxides applicable for electrolytes of proton-conducting solid oxide fuel cells because of its high chemical stability against CO2 and H2O. In this report, we investigate composition dependence of conductivity of LDC ceramics with 1.0 ≤ x ≤ 3.0. Single-phase LDC was obtained for x ≤ 2.6 and the LDC ceramics with x = 2.6 exhibited the highest conductivity. Cell performance of an anode-supported cell with an LDC (x = 2.6) single-layer thin-film electrolyte was also evaluated. Moreover, the effect of stacking La28-yW4+yO54+3y/2v2-3y/2 (LWO) electrolyte with the LDC electrolyte on cell performance was examined. The bilayer cells, in which the LDC and the LWO electrolytes were stacked, exhibited higher open-circuit voltage values than the LDC single-layer cell because of suppressed leakage currents in the electrolyte. The bilayer structure will be an effective cell design to obtain high-performance p-SOFCs.
AB - La-doped ceria (LaxCe4−xO8−x/2: LDC) is one of the promising proton-conducting oxides applicable for electrolytes of proton-conducting solid oxide fuel cells because of its high chemical stability against CO2 and H2O. In this report, we investigate composition dependence of conductivity of LDC ceramics with 1.0 ≤ x ≤ 3.0. Single-phase LDC was obtained for x ≤ 2.6 and the LDC ceramics with x = 2.6 exhibited the highest conductivity. Cell performance of an anode-supported cell with an LDC (x = 2.6) single-layer thin-film electrolyte was also evaluated. Moreover, the effect of stacking La28-yW4+yO54+3y/2v2-3y/2 (LWO) electrolyte with the LDC electrolyte on cell performance was examined. The bilayer cells, in which the LDC and the LWO electrolytes were stacked, exhibited higher open-circuit voltage values than the LDC single-layer cell because of suppressed leakage currents in the electrolyte. The bilayer structure will be an effective cell design to obtain high-performance p-SOFCs.
UR - http://www.scopus.com/inward/record.url?scp=85073235417&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85073235417&partnerID=8YFLogxK
U2 - 10.1149/09101.1019ecst
DO - 10.1149/09101.1019ecst
M3 - Conference contribution
AN - SCOPUS:85073235417
T3 - ECS Transactions
SP - 1019
EP - 1028
BT - Solid Oxide Fuel Cells 16, SOFC 2019
A2 - Eguchi, K.
A2 - Singhal, S. C.
PB - Electrochemical Society Inc.
T2 - 16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019
Y2 - 8 September 2019 through 13 September 2019
ER -