المؤلفون: M. T. Ayala-Ayala, Caleb Carreño-Gallardo, Juan Muñoz-Saldaña, J.E. Ledezma-Sillas, P. S. Cardenas-Terrazas, Antonio F. Fuentes, Jose Martin Herrera-Ramirez, D. A. Leal-Chavez

المصدر: Ionics. 26:4579-4586

مصطلحات موضوعية: Ternary numeral system, Materials science, General Chemical Engineering, General Engineering, Oxide, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, 02 engineering and technology, Activation energy, Electrolyte, Conductivity, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Bismuth, chemistry.chemical_compound, chemistry, Dysprosium, Ionic conductivity, General Materials Science, 0210 nano-technology

الوصف: A novel double dysprosium- and tantalum-doped bismuth oxide electrolyte synthesized by solid-state reaction for low-temperature solid oxide fuel cells (LT-SOFCs) is here reported. The phase structures at room temperature were defined by X-ray powder diffraction (XRD). A stable δ-Bi2O3 phase was obtained by co-doping Bi2O3 with Dy2O3 and Ta2O5 in specific contents. The effect of the co-dopant total content (5–15 mol%) on the ionic conductivity was measured as a function of temperature (300 to 700 °C). Results revealed that the (Dy2O3)13(Ta2O5)2(Bi2O3)85 system showed the highest ionic conductivity as 0.08 S cm−1 at 500 °C, which is three times higher than the binary system reported in the literature (E2O3)20(Bi2O3)80 (20ESB) and in the same range as the ternary system with the highest conductivity reported so far (Dy2O3)8(W2O3)4(Bi2O3)88 (8D4WSB). The lowest activation energy for our system was 0.20 eV at temperatures higher than 550 °C.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::0e636d5172b9d3731dbf472a514dca0e
https://doi.org/10.1007/s11581-020-03572-y