Tri-doped ceria (M0.2Ce0.8O2-δ, M= Sm0.1 Ca0.05 Gd0.05) electrolyte for hydrogen and ethanol-based fuel cells
Journal article, 2019

In recent scientific research, an interest has been gained significantly by rare earth metals such as cerium (Ce), samarium (Sm) and gadolinium (Gd) due to their use in fuel cells as electrolyte and catalysts. When used in an electrolyte, these materials lower the fuel cell's operating temperature compared to a conventional electrolyte, for example, yittria-stabilized zirconia (YSZ) which operates at a high temperature (≥800 °C). In this paper, the tri-doped ceria, M0.2Ce0.8O2-δ(M = Sm0.1Ca0.05Gd0.05) electrolyte powders was synthesized using the co-precipitation method at 80 °C. These dopants were used for CeO2with a total molar ratio of 1 M. Dry-pressed powder technique was used to make fuel cell pellets from the powder and placed them in the furnace to sinter at 700 °C for 60 min. Electrical conductivity of such a pellet in air was 1.2 × 10−2S cm−1at 700 °C measured by the ProboStat-NorECs setup. The crystal structure was determined with the help of X-ray diffraction (XRD), which showed that all the dopants were successfully doped in CeO2. Raman spectroscopy and UV-VIS spectroscopy were also carried out to analyse the molecular vibrations and absorbance, respectively. The maximum open-circuit voltages (OCVs) for hydrogen and ethanol fuelled at 550 °C were observed to be 0.89 V and 0.71 V with power densities 314 mW cm−2and 52.8 mW cm−2, respectively.



Solid oxide fuel cells



Muhammad Kaleem Ullah

COMSATS University Islamabad

Rizwan Raza

COMSATS University Islamabad

M. I. Asghar

Aalto University

Amjad Ali

COMSATS University Islamabad

Asia Rafique

COMSATS University Islamabad

Ghazanfar Abbas

COMSATS University Islamabad

Muhammad Ashfaq Ahmad

COMSATS University Islamabad

Imran Hanif

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Muhammad Akbar

COMSATS University Islamabad

P. D. Lund

Aalto University

Journal of Alloys and Compounds

0925-8388 (ISSN)

Vol. 773 548-554

Subject Categories

Inorganic Chemistry


Materials Chemistry



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