Abstract
Solid electrolytes are mostly used in solid oxide fuel cells (SOFC). In the present study, gallium-substituted compounds (\( {\text{B}}{{\text{i}}_4}{{\text{V}}_{2 - {\text{x}}}}{\text{M}}{{\text{e}}_{\text{x}}}{{\text{O}}_{11 - \delta }} \); Me = Ga3+; 0≤x≤0.4) were prepared by solid-state reaction technique for its use as an electrolyte in SOFC. Structural and conductivity behavior was studied as a function of the Ga3+ substitution on vanadium site. The compounds remain in the orthorhombic α-phase for x = 0 and 0.1 whereas higher concentration of dopant leads to β-phase stabilization. The highest and lowest ionic conductivity were observed in x = 0.2 and x = 0.4 samples, respectively. The prepared samples were studied by using alternating current conductivity, differential thermal analysis and X-ray diffraction techniques. The results are discussed on the basis of formation of oxygen vacancy and its ordering.
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All India Council of Technical Education, New Delhi (India) is highly acknowledged for providing financial help.
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Kant, R., Singh, K. & Pandey, O.P. Structural, thermal and transport properties of \( {\text{B}}{{\text{i}}_4}{{\text{V}}_{2 - {\text{x}}}}{\text{G}}{{\text{a}}_{\text{x}}}{{\text{O}}_{11 - \delta }} \) (0 ≤ x ≤ 0.4). Ionics 16, 277–282 (2010). https://doi.org/10.1007/s11581-009-0392-7
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DOI: https://doi.org/10.1007/s11581-009-0392-7