Ba2±/Ti4±- co-doped layered perovskite B?LaInO4: The structure and ionic (O2¡, H±) conductivity

The new complex oxides Ba1.1La0.9In0.9Ti0.1InO4 and Ba1.1La0.9In0.95Ti0.05O3.98 with Ruddlesden-Popper structure were obtained for the first time. Ba2} and Ti4}- co-doping of B?LaInO4 both with and without change in the oxygen stoichiometry led to an increase in oxygen-ionic and protonic conductivity. It was proved that both factors (geometric and defect concentration) effect the ionic transport in the block-layered structures. The sample Ba1.1La0.9In0.95Ti0.05O3.98 demonstrates the increase in the protonic conductivity by one order of magnitude and it is -90% proton conductor below 400 ?C. ? 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

The new complex oxides Ba1.1La0.9In0.95Ti0.05O3.98 show a significant increase in protonic conductivity through doping, making them promising for practical applications.