Abstract: Highly dispersed oxides MgO, Al2O3, and MgO-Al2O3 were synthesized via an aerogel approach and used as a heterogeneous dopant for the preparation of solid electrolyte composites based on sodium nitrite. The oxides possess a developed surface area of 300–400 m2/g. The effects of the oxide content in the composition of prepared composite materials on their textural properties and phase composition were studied using X-ray diffraction analysis and low-temperature nitrogen adsorption. A mechanism for filling pores of an ionic salt during the formation of a composite was proposed. The introduction of 30–80 mol% of highly dispersed aerogel oxides was found to increase the ionic conductivity of the composites by 3 orders of magnitude. Thus, the ionic conductivity values for pure NaNO2 and the composite solid electrolytes at 200 °C were 1.8 × 10−6 and ∼6 × 10−3 S/cm, respectively. The highest ionic conductivity value of 6.45 × 10−3 S/cm was obtained for the composite sample containing 80 mol% of MgO.

Cite: Shivtsov D.M. , Mateyshina Y.G. , Ilyina E.V. , Pochtar A.A. , Uvarov N.F. , Vedyagin A.A.
Hybrid Solid Electrolyte Composites Based on NaNO2 and Aerogel-Prepared Mg-Al Oxides
Inorganic Chemistry Communications. 2025. V.176. 114324 :1-10. DOI: 10.1016/j.inoche.2025.114324 Scopus РИНЦ AN

Dates:

Submitted:	Feb 3, 2025
Accepted:	Mar 11, 2025
Published online:	Mar 13, 2025
Published print:	Jun 2, 2025

Identifiers:

Scopus:	2-s2.0-86000752770
Elibrary:	80603596
Chemical Abstracts:	2025:636983

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