Intriguing electrochemistry in low-temperature single layer ceramic fuel cells based on CuFe2O4. (14th September 2020)

• Record Type: Journal Article
• Authors: Asghar, M.I.; Yao, X.; Jouttijärvi, S.; Hochreiner, E.; Virta, R.; Lund, P.D.
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 45(2020)
• Page Start: 24083
• Page End: 24092
• Publication Date: 2020-09-14
• Subjects: Catalysis -- Ceramic -- Composite -- Fuel cell -- Single component; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.09.175
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A composite of CuFe2 O4 and Gd-Sm co-doped CeO2 is studied for a single layer ceramic fuel cell application. In order to optimize the cell performance, the effects of sintering temperatures (600 °C, 700 °C, 800 °C, 900 °C and 1000 °C) were investigated for the fabrication of the cells. It was found that the cells sintered at 700 °C outperformed other cells with a maximum peak power density of 344 mW/cm 2 at 550 °C. The electrochemical impedance spectroscopy analysis on the best cell revealed significant ohmic losses (0.399 Ω cm 2 ) and polarization losses (0.174 Ω cm 2 ) in the cell. The HR-TEM and SEM gave microstructural information of the cell. The HT-XRD spectra showed the crystal structures in different sintering temperatures. The cell performance was stable and the composite material did not degrade during an 8 h stability test under open-circuit condition. This study opens up new avenues for the exploration of this nanocomposite material for the low temperature single component ceramic fuel cell research. Graphical abstract: Image 1 Highlights: Single layer cells based on CuFe2 O4 and GdSm-CeO2 were fabricated. Cells without Ni foam/NCAL produced reasonable power density at 550 °C. Analysis on sintering temperatures for cell fabrication was performed.