The role of vanadium substitution in the oxygen sublattice disorder of Ba₇Nb₄MoO₂₀-based hexagonal perovskite oxide-ion conductors.

ABSTRACT: Ba₇Nb₄MoO₂₀-based hexagonal perovskite derivatives are promising oxygen-ion conductors for solid electrolytes in solid-oxide fuel cells and electrolysers. A thorough understanding of chemical substitution and its impact on structural features conducive to high ionic conductivity is fundamental for decreasing the operation temperature of such devices. Here, a new 7H polytype-based composition, namely Ba₇Nb_3.9-x V _x Mo_1.1O_20.05, is investigated to assess the effect of vanadium substitution. Structural changes upon V incorporation are studied using X-ray and neutron diffraction, as well as ⁵¹V and ⁹³Nb solid-state nuclear magnetic resonance spectroscopy. For the undoped

SUBMITTER: Biffo AO 

PROVIDER: S-EPMC11484498 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature