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- W2022371278 abstract "Barium cerate exhibits high protonic conductivity, especially when modified by trivalent dopant such as Y, Yb, Nd, Sm or Dy. Unfortunately, the poor chemical stability in the presence of CO2 is the main disadvantage of this material. One of the possible approach to get the stable protonic conductor is the preparation of solid solutions. For example, doping of BaCeO3 with Zr leads to the improvement of the chemical stability, but the electrical properties are simultaneously corrupted. In the present work the influence of Ti, per analogy to Zr, and Y dopants on electrical properties of BaCeO3 was investigated using the electrochemical impedance spectroscopy (EIS) technique. BaCe1−xTixO3−δ (0 ≤ x ≤ 0.3) and Ba(Ce0.95Ti0.05)0.95Y0.05O3−δ solid electrolytes were prepared by solid-state reaction method. It was found that the changes of electrical properties due to the introduction of Ti into the BaCeO3 lattice is caused predominantly by the modification of the grain boundary properties. The Ti doping leads to the substantial decrease of grain boundary electrical conductivity, comparing to undoped material. The introduction of yttrium dopant to the BaCe0.95Ti0.05O3 lattice has the opposite effect. The total electrical conductivity increases, due to significant modification of grain boundary electrical properties." @default.
- W2022371278 created "2016-06-24" @default.
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- W2022371278 date "2009-10-01" @default.
- W2022371278 modified "2023-10-13" @default.
- W2022371278 title "Electrochemical impedance spectroscopy of BaCeO3 modified by Ti and Y" @default.
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- W2022371278 doi "https://doi.org/10.1016/j.jpowsour.2009.01.098" @default.
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