The bulk electrical conductivity properties of δ-Bi2O3 solid electrolyte system doped with Yb2O3

Abstract

In the present work, the binary system of (Bi 2 O 3 ) 1-x (Yb 2 O 3 ) x was investigated. For the production and stabilization of the fcc-type solid solution, small amounts of Yb 2 O 3 were doped into pure a-Bi 2 O 3 by the solid-state reactions in the doping range of 0.10 B x B 0.2. According to XRD and electrical conductivity measurements, the crystal formula of the formed d-Bi 2 O 3 was found to be Bi(III) 4-2x Yb(II) 2x O 6-x h 2?x (h: oxygen ion vacancies, VOÁÁ) and x values were in the range of 0.14 B x B 0.20 for heat treatment at 750°C. Four-probe d.c. electrical conductivity measurements showed that the studied system had an O 2-ionic-type electrical conductivity behavior. The maximum levels of the electrical conductivity were observed for 16 mol d-YSB material which had r T values: 0.316 and 0.632 X -1 cm -1 at 700 and 750°C, respectively. These materials can be used as ceramic electrolytes for solid electrolytic industrial applications.

Synthesis and Characterization of Tb–Er Co–Doped Bi2O3 Solid Electrolyte Systems

“…However, the electrical conductivity of YSZ decreases significantly at low operating temperatures. In contrast, Bismuth Oxide (Bi2O3)-based solid electrolyte systems, which are anticipated to be a good solid electrolyte option, exhibit greater electrical conductivity in the same temperature range as YSZ electrolytes [9,10]. This situation has attracted the attention of many researchers who are studying on the synthesis and characterization of solid electrolyte materials.…”

Current Applications and Future Potential of Rare Earth Oxides in Sustainable Nuclear, Radiation, and Energy Devices: A Review

“…In addition, Nd 3+ and Dy 3+ codoped Ce 0.8 Nd x ‑y Dy y O 2‑{ x ‑ y /2+ y } ( x = 0.2, y = 0.04, 0.08, 0.1), Au/Dy 2 O 3 , the binary system of (Bi 2 O 3 ) 1– x (Yb 2 O 3 ) x , Bi 3+ -doped Ce 0.75‑ x Bi x Gd 0.25 O 2 ( x = 0.0, 0.05, 0.10), CeO 2 tridoped with LiBi and Gd are the recently developed electrolyte systems. These REO-based SOFCs systems provided better stability a lower system temperature with long-term performance of the SOFCs. − …”

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi2O3:M (M = S, Se, and Re)

“…49−52 Stabilization of δ-Bi 2 O 3 to room temperature can be achieved by doping, 53 in mind that incorporation of dopants into the crystal lattice of bismuth(III) influences the physical properties and, for example, reduces the oxygen ion conductivity by several orders of magnitude. 10,54−56 In the last decades, numerous reports have dealt with the stabilization of δ-Bi 2 O 3 using a variety of main-group elements and transition metals (B, 14 P, 57 Ti, 58,59 V, 31−34 Fe, 60 Y, 61,62 Nb, 62,63 Te, 64 Ta, 65 Ce, 66−68 Eu, 69 Tb, 70 Dy, 71,72 Er, 73−75 Tm, 76 Yb, 77,78 Lu, 79 and Th 80 ) and double-doping (Hf/Zr, 81 Te/V, 82 Y/Yb, 83 Er/Nb, 84 Er/Gd, 85 Ho/Gd, 86 Ho/Dy, 87 Dy/W, 88 Sm/Ce, 89 Sm/Yb, 90 La/Mo, 91 Pr/Mo, 92 Dy/Tm, 93 Gd/Lu, 94,95 Yb/Dy, 96,97 Eu, or Tb/Th 98 ).…”

“…Thus, a plethora of synthetic approaches for δ-Bi 2 O 3 in the form of powders, − ,,,,− films, ,− nanosheets, and nanowires was developed. However, stabilization of pure δ-Bi 2 O 3 at room temperature is still a challenge; therefore, the application of the metastable modification is restricted to a low number of examples. − Stabilization of δ-Bi 2 O 3 to room temperature can be achieved by doping, but it must be kept in mind that incorporation of dopants into the crystal lattice of bismuth­(III) influences the physical properties and, for example, reduces the oxygen ion conductivity by several orders of magnitude. ,− In the last decades, numerous reports have dealt with the stabilization of δ-Bi 2 O 3 using a variety of main-group elements and transition metals (B, P, Ti, , V, − Fe, Y, , Nb, , Te, Ta, Ce, − Eu, Tb, Dy, , Er, − Tm, Yb, , Lu, and Th) and double-doping (Hf/Zr, Te/V, Y/Yb, Er/Nb, Er/Gd, Ho/Gd, Ho/Dy, Dy/W, Sm/Ce, Sm/Yb, La/Mo, Pr/Mo, Dy/Tm, Gd/Lu, , Yb/Dy, , Eu, or Tb/Th…”