NaAlNb(PO<sub>4</sub>)<sub>3</sub> NASICON-type phosphate with the Nb<sup>5+</sup>/Nb<sup>4+</sup>/Nb<sup>3+</sup>multielectron redox activity on sodium intercalation
The NASICON-structured NaAlNb(PO<sub>4</sub>)<sub>3</sub> phosphate was synthesized <em>via</em> Pechini sol-gel technique. Electrochemical measurements in sodium half-cells have disclosed that NaAlNb(PO<sub>4</sub>)<sub>3</sub> can reversibly intercalate 2Na<sup>+</sup> ions per formula unit owing to the Nb<sup>5+</sup>/Nb<sup>4+</sup>/Nb<sup>3+</sup> multielectron redox processes, which was confirmed by the Nb <em>K</em>-edge XANES measurements. Differential thermal calorimetry has revealed an excellent thermal stability of the sodiated NaAlNb(PO<sub>4</sub>)<sub>3</sub>/C electrode material up to the point of electrolyte decomposition.
Authors
- Daniil Andreevich Novichkov (ORCID: https://orcid.org/0000-0002-8246-5244)
- Ilia R. Cherkashchenko (ORCID: https://orcid.org/0000-0003-0920-9794)
- А. В. Бабкин (ORCID: https://orcid.org/0000-0001-9786-1998)
- Nellie R. Khasanova (ORCID: https://orcid.org/0009-0001-8520-0911)
- Rodion Vladislavovich Panin
- Е.В. Антипов
Institutions
- Skolkovo Institute of Science and Technology (RU)
- Lomonosov Moscow State University (RU)
Publication Details
- Journal
- Mendeleev Communications
- Published
- 2025-01-01
- DOI
- https://doi.org/10.71267/mencom.7637
- Citations
- 5
- Primary Topic
- Inorganic Chemistry and Materials
- Type
- article
- Field-Weighted Citation Impact
- 2.69
Funders
- Russian Science Foundation