Revisiting the layered Na3Fe3 (PO4) 4 phosphate sodium insertion compound: structure, magnetic and electrochemical study

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dc.contributor.authorShinde, GSen_AU
dc.contributor.authorGond, Ren_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorLing, CDen_AU
dc.contributor.authorRao, RPen_AU
dc.contributor.authorAdams, Sen_AU
dc.contributor.authorBarpanda, Pen_AU
dc.date.accessioned2021-06-30T05:30:07Zen_AU
dc.date.available2021-06-30T05:30:07Zen_AU
dc.date.issued2019-11-18en_AU
dc.date.statistics2021-06-29en_AU
dc.description.abstractLayered sodium iron phosphate phase [Na3Fe3(PO4)4] was synthesized by solution combustion synthesis method, marking the first attempt of solvothermal synthesis of this phase. Its crystal structure was verified by synchrotron and neutron powder diffraction. Rietveld analyses proved the phase purity and formation of monoclinic framework with C2/c symmetry. It undergoes an antiferromagnetic ordering ~27 K. This combustion prepared nanoscale Na3Fe3(PO4)4 compound was found to be electrochemically active with a stepwise voltage profile involving an Fe3+/Fe2+ redox activity centred at 2.43 V vs. Na/Na+. Despite various cathode optimization, only 1.8 Na+ per formula unit could be reversibly inserted into the Na3Fe3(PO4)4 framework leading to capacity close to 50 mAh g−1. This limited electrochemical activity can be rooted to (i) relatively large diffusion barrier (ca. 0.28 eV) as per Bond valence site energy (BVSE) calculations and (ii) possible structural instability during (de)sodiation reaction. © 2019 The Author(s). CC-BY licence - Published by IOP Publishing Ltden_AU
dc.identifier.articlenumber014001en_AU
dc.identifier.citationShinde, G. S., Gond, R., Avdeev, M., Ling, C. D., Rao, R. P., Adams, S., & Barpanda, P. (2020). Revisiting the layered Na3Fe3 (PO4) 4 phosphate sodium insertion compound: structure, magnetic and electrochemical study. Materials Research Express, 7(1), 014001. doi:10.1088/2053-1591/ab54f4en_AU
dc.identifier.issn2053-1591en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleMaterials Research Expressen_AU
dc.identifier.urihttps://doi.org/10.1088/2053-1591/ab54f4en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10987en_AU
dc.identifier.volume7en_AU
dc.language.isoenen_AU
dc.publisherIOP Publishingen_AU
dc.subjectCrystal structureen_AU
dc.subjectSodiumen_AU
dc.subjectIronen_AU
dc.subjectPhosphatesen_AU
dc.subjectCombustionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectElectrochemistryen_AU
dc.subjectCathodesen_AU
dc.subjectRedox processen_AU
dc.titleRevisiting the layered Na3Fe3 (PO4) 4 phosphate sodium insertion compound: structure, magnetic and electrochemical studyen_AU
dc.typeJournal Articleen_AU
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