| Issue |
MATEC Web Conf.
Volume 340, 2021
VII International Russian - Kazakhstan Conference “Chemical Technologies of Functional Materials” (RKFM 2021)
|
|
|---|---|---|
| Article Number | 01012 | |
| Number of page(s) | 10 | |
| DOI | https://doi.org/10.1051/matecconf/202134001012 | |
| Published online | 08 July 2021 | |
Crystal structure and electrochemical properties of phosphosulphate NaFe2PO4(SO4)2
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences, 18 Kutateladze, 630128 Novosibirsk, Russia
一 Corresponding author: kosova@solid.nsc.ru
NASICON-type NaFe2(PO4)(SO4)2 (NFPS) electrode material is successfully synthesized via a rheological route. DSC/TG analysis shows that it is thermally stable up to 760 °C. A carbon composite NFPS/C was obtained using ball milling. NFPS and NFPS/C were investigated as cathode and anode materials for sodium-ion batteries. Analysis of migration paths was performed by the Voronoi-Dirichlet partition technique to determine all possible Na+ ion migration paths. The diffusion coefficient, estimated by GITT, is in the 10-12-10-13 cm2∙s-1 range, which corresponds to the fast Na+ ion migration in the structure. According to calculations, NFPS is a wide band gap material, which indicates its poor electrical conductivity.
© The Authors, published by EDP Sciences, 2021
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