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Synthesis, structure and electrochemical performance of Eldfellite, NaFe(SO4)2, doped with SeO4, HPO4 and PO3F

AuthorsTrussov, I.A.; Kokhmetova, S.T.; Driscoll, L.L.; Smith, R.; Berry, F.J.; Marco, J.F. ; Galeyeva, A.K.; Kurbatov, A.P.; Slater, P.R.
Issue Date2020
PublisherAcademic Press
CitationJournal of Solid State Chemistry 289 (2020)
AbstractNaFe(SO) materials partially substituted with SeO, HPO and POF were prepared and investigated as possible cathode materials for sodium-ion batteries. Neutron diffraction and Raman spectroscopy studies confirmed the successful incorporation of SeO and HPO, while the Raman studies suggested that significant hydrolysis of POF had occurred during the synthesis. The effective diffusion coefficients were determined from conductivity and electrochemical kinetics studies, showing low Na ion diffusion. Galvanostatic and cyclic voltammetry investigations demonstrated more significant degradation and a narrowing of the electrochemical stability window for the doped materials, which was most significant for the SeO and HPO doped samples. Therefore, while doped NaFe(SO) were successfully prepared, the best electrochemical performance was shown for the undoped system.
Publisher version (URL)http://dx.doi.org/10.1016/j.jssc.2020.121395
Identifiersdoi: 10.1016/j.jssc.2020.121395
issn: 1095-726X
Appears in Collections:(IQFR) Artículos
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