A methane-fueled SOFC based on a thin BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3−δ electrolyte film and a LaNi 0.6 Co 0.4 O 3 anode functional layer

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 4; no. 14; pp. 5102 - 5106
• Main Authors: Konwar, Dimpul, Yoon, Hyon Hee
• Format: Journal Article
• Language: English
• Published: 2016
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/C5TA10689C

A methane-fueled solid oxide fuel cell (SOFC) operating at 500–650 °C was fabricated using a thin BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3−δ (BZCYYb) electrolyte film and a LaNi 0.6 Co 0.4 O 3 anode functional layer. Thin BZCYYb electrolyte films (thickness = 3 μm) and NiO–BZCYYb anode supports were prepared by electron beam vapor deposition. A LaNi 0.6 Co 0.4 O 3 catalyst layer was coated onto the anode support. The BZCYYb electrolyte film was characterized by X-ray diffraction and scanning electron microscopy. Current–voltage ( I – V ) curves and impedance spectra were measured to characterize the electrochemical performance of the cell. The NiO–BZCYYb anode exhibited a high coking resistance, and the cell was stable for 200 h when operated under methane at 550 °C. The presence of the LaNi 0.6 Co 0.4 O 3 functional catalyst significantly enhanced the cell performance. The maximum power densities of the prepared cells were 0.98, 0.65, 0.51 and 0.40 W cm −2 at 650, 600, 550 and 500 °C, respectively, under methane fuel.