Crystal Structure and Migration Paths of Alkaline Ions in NaVPO4F Full article
| Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084 |
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| Output data | Year: 2020, Volume: 22, Number: 28, Pages: 15876-15884 Pages count : 9 DOI: 10.1039/d0cp02204g | ||||||||
| Tags | VANADYL-TYPE DEFECTS; CATHODE; PERFORMANCE; FLUOROPHOSPHATE; SPECTROSCOPY; FAMILY | ||||||||
| Authors |
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| Affiliations |
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Funding (3)
| 1 | Federal Agency for Scientific Organizations | 0301-2016-0021 (АААА-А17-117030310277-6) |
| 2 | Russian Science Foundation | 19-73-10026 (АААА-А19-119102490043-4) |
| 3 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
Abstract:
A sample with a nominal composition ‘NaVPO4F’ is prepared by mechanochemically assisted solid-state synthesis using quenching. A detailed study of its crystal and local structure is conducted by means of XRD and FTIR and solid-state 31P NMR spectroscopies in comparison with Na3V2(PO4)2F3. It is shown that the as-prepared ‘NaVPO4F’ has a multiphase composition, including NaVPO4F as the main phase and Na3V2(PO4)2F3 and Na2.57V4P4O17F as the side products. The crystal structure of NaVPO4F is described in the monoclinic C2/c space group. It is characterized by negligible V3+/V4+ oxidation with the corresponding F−/O2− substitution and the presence of structural disordering. Using the Voronoi–Dirichlet partition (VDP) method, the Na+ and Li+ migration pathways in Tavorite-like NaVPO4F and closely related LiVPO4F (with the triclinic structure, P1 S.G.) are analyzed. While the Na+ migration is suppressed in both cases, the Na+/Li+ ion exchange in NaVPO4F with the formation of monoclinic LiVPO4F could occur, but is difficult due to the sodium immobility rather than the instability of the lithium derivatives as was concluded from the DFT calculations.
Cite:
Semykina D.O.
, Yakovlev I.V.
, Lapina O.B.
, Kabanov A.A.
, Kosova N.V.
Crystal Structure and Migration Paths of Alkaline Ions in NaVPO4F
PCCP: Physical Chemistry Chemical Physics. 2020. V.22. N28. P.15876-15884. DOI: 10.1039/d0cp02204g WOS Scopus РИНЦ AN PMID OpenAlex
Crystal Structure and Migration Paths of Alkaline Ions in NaVPO4F
PCCP: Physical Chemistry Chemical Physics. 2020. V.22. N28. P.15876-15884. DOI: 10.1039/d0cp02204g WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Apr 24, 2020 |
| Accepted: | Jun 23, 2020 |
| Published online: | Jun 25, 2020 |
| Published print: | Jul 28, 2020 |
Identifiers:
| Web of science: | WOS:000552193500004 |
| Scopus: | 2-s2.0-85088676010 |
| Elibrary: | 45444031 |
| Chemical Abstracts: | 2020:1246077 |
| PMID: | 32638762 |
| OpenAlex: | W3037235717 |