NiO–Ba<sub>0.95</sub>Ca<sub>0.05</sub>Ce<sub>0.9</sub>Y<sub>0.1</sub>O<sub>3−</sub><sub>δ</sub> as a Modified Anode Material Fabricated by the Tape Casting Method
Magdalena Dudek,
Bartłomiej Lis,
Ryszard Kluczowski,
Mariusz Krauz,
Magdalena Ziąbka,
Marcin Gajek,
Alicja Rapacz-Kmita,
Michał Mosiałek,
Piotr Dudek,
Dorota Majda,
Andrzej Raźniak
Affiliations
Magdalena Dudek
Faculty of Energy and Fuels, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Bartłomiej Lis
Faculty of Energy and Fuels, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Ryszard Kluczowski
Institute of Power Engineering–Research Institute, Mory 8, 01-330 Warsaw, Poland
Mariusz Krauz
Institute of Power Engineering–Research Institute, Mory 8, 01-330 Warsaw, Poland
Magdalena Ziąbka
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Marcin Gajek
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Alicja Rapacz-Kmita
Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Michał Mosiałek
Jerzy Haber Institute of Catalysis and Surface Chemistry PAS, Niezapominajek 8, 30-239 Krakow, Poland
Piotr Dudek
Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
Dorota Majda
Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
Andrzej Raźniak
Faculty of Energy and Fuels, AGH University of Science and Technology, Av. A. Mickiewicza 30, 30-059 Krakow, Poland
The development of new chemically resistant anodes for protonic ceramic fuel cells (PCFCs) is urgently required to avoid the costly deep hydrogen purification method. Ba0.95Ca0.05Ce0.9Y0.1O3−δ (5CBCY), which is more chemically resistant than BaCaCe0.9Y0.1O3−δ, was here tested as a component of a composite NiO–5CBCY anode material. A preparation slurry comprising 5CBCY, NiO, graphite, and an organic medium was tape cast, sintered and subjected to thermal treatment in 10 vol.% H2 in Ar at 700 °C. Differential thermal analysis, thermogravimetry, quadrupole mass spectrometry, X-ray diffraction analysis, scanning electron microscopy, the AC four-probe method and electrochemical impedance spectroscopy were used for the investigation. The electrical conductivity of the Ni–5CBCY in H2–Ar at 700 °C was 1.1 S/cm. In the same gas atmosphere but with an additional 5 vol.% CO2, it was slightly lower, at 0.8 S/cm. The Ni–5CBCY cermet exhibited repeatable electrical conductivity values during Ni-to-NiO oxidation cycles and NiO-to-Ni reduction in the 5CBCY matrix, making it sufficient for preliminary testing in PCFCs.
