Feasibility of alternative electrode materials for high temperature CO2 reduction on solid oxide electrolysis cell

• Published in: Journal of power sources Vol. 293; pp. 642 - 648
• Main Authors: Singh, Vandana, Muroyama, Hiroki, Matsui, Toshiaki, Hashigami, Satoshi, Inagaki, Toru, Eguchi, Koichi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20.10.2015
• Subjects: Carbon dioxide reduction; High temperature; Lanthanum strontium cobalt ferrite; Mixed conductivity; Ni– Gadolinium doped ceria; Solid oxide electrolysis cell; Solid oxide electrolysis cell; Ni– Gadolinium doped ceria; Mixed conductivity; Carbon dioxide reduction; High temperature; Lanthanum strontium cobalt ferrite
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2015.05.088

The electrochemical performance of Ni–gadolinia-doped ceria (GDC) cathode was studied for CO2 reduction on solid oxide electrolysis cell (SOEC) at 1000 °C and compared with that of Ni–yttria stabilized zirconia (Ni–YSZ) cathode. Ni–GDC cathode demonstrated higher performance for CO2 reduction. Furthermore, lanthanum strontium cobalt ferrite (LSCF) anode exhibited lower overpotential than lanthanum strontium manganite–yttria stabilized zirconia (LSM–YSZ) anode. Ni–GDC cathode and LSCF anode were found to be stable under a constant current density of −0.90 A cm−2 at 900 °C. Moreover, no substantial performance degradation was observed for the cell having Ni–GDC cathode and LSCF anode even after 9 h of electrolysis operation under a constant current density of −1.2 A cm−2 at 1000 °C. •Galvanostatic experiments were conducted for high-temperature CO2 reduction.•No delamination was observed for LSCF anode operated at extreme conditions.•Contrary to Ni–YSZ, microstructure of Ni–GDC was unchanged after current loading.