Fabrication, characterization, and performance of YbDSB ternary compounds for IT‐SOFC applications

Abstract

(Yb2O3)x(Dy2O3)y(Bi2O3)1−x−y (0.04≤x+y≤0.20) powders (xYbyDSB) were synthesized by modified sol‐gel Pecchini method. The powders were characterized for structural, surface morphological, thermal, and electrical properties and power density measurements by means of X‐ray diffraction (XRD), scanning electron microscopy (SEM), differential thermal analysis/thermal gravimetry (DTA/TG), and impedance spectroscopy, respectively. Lattice parameters and crystalline size of δ‐phase of Yb2O3‐ and Dy2O3‐doped Bi2O3 samples were calculated from the X‐ray diffraction data. Surface and grain properties of the related phases were determined by SEM analysis. In the investigated system, the maximum electrical conductivity was observed as σ=0.954 S cm−1 for 6% mol Yb2O3 and 6% mol Dy2O3 at 800°C among all δ‐YbDSB systems. Cathode supported electrochemical cell was fabricated and 6Yb6DSB was used as the electrolyte. Maximum power density of single cell with an active area of 1.5 cm2 is 72.50 mW/cm2 at 700°C.

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

“…In a separate study, a cathode-supported electrochemical cell with 6Yb6DSB showed a maximum power density of 72.50 mW/cm 2 at 700 °C . REOs are also used as the electrode material to increase metal oxide fuel cell performance.…”

“…Eventually, the Yb 3+ content was proven to be a property controller of a ternary system, i.e., (Yb 2 O 3 ) y –(Sc 2 O 3 ) (0.11‑ y ) –(ZrO 2 ) 0.89 ( y = 0–0.11) . Another ternary system, (Yb 2 O 3 ) x (Dy 2 O 3 ) y (Bi 2 O 3 ) 1‑ x ‑ y , also showed high electrical conductivity (i.e., 0.954 S cm –1 ) for 6% mol Yb 2 O 3 and 6% mol Dy 2 O 3 at 800 °C Figure shows the various luminescence parameters (such as absorbance, PL intensity, conductivity, and so on) of the unique Nd 3+ and Dy 3+ -codoped cerium oxide electrolyte compositions for the SOFC.…”

“…In a separate study, a cathode-supported electrochemical cell with 6Yb6DSB showed a maximum power density of 72.50 mW/cm 2 at 700 °C. 101 REOs are also used as the electrode material to increase metal oxide fuel cell performance. For example, a metal-supported SOFC, (Bi 2 O 3 ) 0.7 (Er 2 O 3 ) 0.3 -Ag, cathode showed improved power density with great cell stability.…”

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…”