Communications

Sodium intercalation into the NaNbTi(PO₄)₃ NASICON-type phosphate

I. R. Cherkashchenko^ab, R. V. Panin^b, V. A. Razuvaeva^b, A. O. Polevik^b, D. A. Novichkov^b, I. V. Mikheev^b, E. V. Antipov^ab, N. R. Khasanova<sup>b

a</sup> Skolkovo Institute of Science and Technology, 143025 Moscow, Russian Federation
^b Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation

Аннотация: The NaNbTi(PO₄)₃ material with the NASICON structure (space group R3c) was prepared by the Pechini-type technique followed by spark plasma sintering. XANES measurements revealed mixed-valence states of niobium (Nb^5+/4+) and titanium (Ti^4+/3+). The material exhibits reversible electrochemical intercalation of about 1.67 Na⁺ per formula unit at a C/10 rate, with a gradual decrease in capacity, which could be attributed to the mixing of Na⁺ and Ti³⁺ cations in the structure.

Ключевые слова: NASICON-type materials, Pechini-type technique, spark plasma sintering, sodium insertion, reversible intercalation.

Поступила в редакцию: 10.09.2025
Принята в печать: 25.09.2025

Язык публикации: английский

DOI: 10.71267/mencom.7914

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