none 10.15826/chimtech.9038 Ural Federal University Ural Federal University 6469 184225926 267042 1766940070 10.15826 2025-12-29T05:35:13Z 2025-10-23T08:21:15Z 0 Chimica Techno Acta Chim.Tech.Acta 2411-1414 12 26 2025 12 4 Nataliia Tarasova Institute of High Temperature Electrochemistry Ural Federal University http://orcid.org/0000-0001-7800-0172 Daniil Pyankov Institute of High Temperature Electrochemistry Ural Federal University Viktoria Zaviralova Institute of High Temperature Electrochemistry Ural Federal University Vladislava Gnatyuk Institute of High Temperature Electrochemistry Ural Federal University Ksenia Belova Ural Federal University https://orcid.org/0000-0003-0768-7039 Complex oxides with a spinel structure can be considered as promising electrolyte materials for electrochemical devices to be used in energy generation. In this paper, complex oxides with a spinel structure were obtained, and their electrical conductivity properties at various pH2O and pO2 were investigated for the first time. These compositions are unstable in a humid atmosphere and decompose to barium hydroxide and metal oxide. The electrical conductivity values of BaNd2O4 and BaSm2O4 spinels must be measured strictly in an atmosphere with controlled humidity. The nature of their conductivity is mixed ionic-hole. The conductivity value of the BaNd2O4 composition is higher than that of the BaSm2O4 composition. The greatest values of the ionic conductivity were recorded for the BaSm2O4 composition, in which the share of oxygen ionic transport reaches up to 85% at low temperatures. The values of electrical conductivity at 700 oC are –3.2 and –3.6 S/cm for the BaNd2O4 and BaSm2O4 compositions; the values of ionic conductivity are –3.7 and –4.2 S/cm, correspondingly. 09 23 2025 9038 9038 1 10.15826/chimtech.crossmarkpolicy https://creativecommons.org/licenses/by/4.0/ 10.15826/chimtech.9038 https://chimicatechnoacta.ru/article/view/9038 https://chimicatechnoacta.ru/article/viewFile/9038/6236 https://chimicatechnoacta.ru/article/viewFile/9038/6236 10.1016/j.trac.2025.118159 10.1088/2053-1591/ad6ef0 10.1016/B978-0-323-95476-1.00007-1 10.1007/978-981-99-2583-4_9 Raturi P, Khan I, Joshi G, Kumar S, Gupta S. Ferrite nanoparticles for sensing applications. In Engineered ferrites and their applications (pp. 151–187). Singapore: Springer Nature; 2025. 10.1007/s10854-025-14329-6 10.1016/S0955-2219(99)00153-3 10.1007/s10853-025-10946-y 10.1080/15421406.2024.2366061 Klym H, Hadzaman I, Vasylchyshyn I, Kushnir O. Sintering and exploitation properties of humidity-sensitive nanostructured ceramics and thick films based on MgAl2O4 spinel. Molecular Crystals and Liquid Crystals. 2024;768(16):840–848. 10.3390/s22166194 10.1016/j.ceramint.2013.08.074 10.1590/S1516-14392014005000073 10.1016/j.micromeso.2022.111797 10.1021/acs.energyfuels.1c00275 10.1016/j.cej.2024.158056 10.1002/smtd.202100550 10.1016/j.est.2022.104148 10.1016/j.est.2024.112954 10.1016/j.diamond.2024.111808 10.1002/pssa.202100542 10.1016/j.jeurceramsoc.2023.11.004 10.1088/978-0-7503-5729-6ch6 Margoni MM, Akbari-Fakhrabadi A, Mangalaraja RV Recent advances in cobalt-based cathode materials for intermediate solid oxide fuel cells. Mater Technol Energy Environment Nexus. 2023;2:6–10. 10.1039/D4SC03306J 10.1117/12.2048836 10.1016/j.cej.2024.152155 10.1021/acsami.4c03419 Chen G, Jin Y, Yuan L, Wang B, Huo J, Suo H, Wang F. Unlocking Cr3+–Cr3+ coupling in spinel: ultrabroadband near-infrared emission beyond 900 nm with high efficiency and thermal stability. ACS Appl Mater Interfaces. 202;16(23):30185–30195. 10.1021/acs.energyfuels.5c00318 Zentefis NP, Fiore A, Yang Y. Recent Advancements of Spinel Oxide Materials in Energy and Fuel Applications. Energy Fuels. 2025;39(15):7167–7181. 10.1039/D4TA08703H Deng W, Xu Y, Zhang X, Xia J, Xu K, Gao H, Chen Y. Achieving active and durable oxygen reduction/evolution reactions on protonic ceramic electrochemical cells with spinel-based air electrodes. J Mater Chem A. 2025;13(21):15636–15644. 10.1021/acs.chemrev.4c00614 10.1002/inf2.12515 10.1007/s40518-024-00248-3 10.1016/j.ijhydene.2024.03.328 10.15826/elmattech.2022.1.004 10.1016/j.electacta.2024.145142 10.1134/S0036024412080134 10.1016/j.ssi.2015.03.025 10.1016/j.ceramint.2024.08.426 10.1016/j.jechem.2024.02.045 10.1016/j.ijhydene.2025.150689 10.1016/S0167-2738(02)00138-8 10.1021/cm500776x 10.1039/c5ta03185k 10.1016/j.ssi.2015.09.014 10.1016/j.ssi.2016.01.011 10.1021/acs.jpcc.6b00700 Yang X, Liu S, Lu F, Xu J, Kuan, X. Acceptor doping and oxygen vacancy migration in layered perovskite NdBaInO4-based mixed conductors. J Phys Chem C. 2016;120:6416–6426. 10.2109/jcersj2.18110 Fijii K, Yashima M. Discovery and development of BaNdInO4 – A brief review. J Ceram Soc Jpn. 2018;126:852–859. 10.1007/s11581-025-06434-7 10.3390/ma12101668 10.1039/C8NJ05320K 10.1021/acs.chemmater.0c04828 10.1016/j.ceramint.2022.02.102 10.1007/s11581-025-06383-1 10.1016/j.ceramint.2024.05.479 10.1016/j.ijhydene.2025.150824 10.1002/adfm.202206777 10.1107/S0365110X57001929 10.1016/j.progsolidstchem.2014.05.001 10.2109/jcersj.102.583 10.3390/en10111787 10.1016/j.cej.2021.131978 10.1021/cm2036794