Cathodic materials for intermediate-temperature solid oxide fuel cells based on praseodymium nickelates-cobaltites

Autor: Aman Dhir, Nikkia McDonald, Yu. E. Fedorova, A. S. Ulikhin, Vladimir A. Rogov, Vladislav A. Sadykov, J. Watton, Oleg Bobrenok, E.M. Sadovskaya, N. V. Mezentseva, J. Mertens, Galina Alikina, Izaak C. Vinke, T. A. Kriger, Robert Steinberger-Wilckens, V. D. Belyaev, A. S. Bobin, Nikolai F. Uvarov, Yu. S. Okhlupin, N.F. Eremeev, V. S. Muzykantov
Rok vydání: 2014
Předmět:
Zdroj: Russian Journal of Electrochemistry. 50:669-679
ISSN: 1608-3342
1023-1935
DOI: 10.1134/s1023193514070131
Popis: A unique combination of methods (TPD of O2, thermogravimetry, isotopic heteroexchange of oxygen in different modes) was used to carry out detailed studies of oxygen mobility and reactivity in mixed praseodymium nickelates-cobaltites (PrNi1 − x Co x O3 + δ) and their composites with doped cerium dioxide (Ce0.9Y0.1O2 − δ) as promising cathodic materials stable towards the effect of CO2 in the intermediate-temperature region. It is shown that in the case of composites of PrNi1 − x Co x O3+δ-Ce0.9Y0.1O2 − δ synthesized using the Pechini method and ultrasonic treatment, stabilization of the disordered cubic perovskite phase due to redistribution of cations between the phases provides high oxygen mobility. Preliminary results on tests of cathodic materials of this type supported on planar NiO/YSZ anodes (H.C. Starck) with a thin layer of YSZ electrolyte and a buffer Ce0.9Y0.1O2 − δ layer showed that power density of up to 0.4 W/cm2 was reached in the region of medium (600–700°C) temperatures, which was close to typical values for fuel cells of this type with cathodes based on strontium-doped perovskites and their composites with electrolytes.
Databáze: OpenAIRE
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