Sodium-Vanadium Bronze Na9V14O35: An Electrode Material for Na-Ion Batteries
dc.bibliographicCitation.firstPage | 86 | eng |
dc.bibliographicCitation.issue | 1 | eng |
dc.bibliographicCitation.volume | 27 | eng |
dc.contributor.author | Kirsanova, Maria A. | |
dc.contributor.author | Akmaev, Alexey S. | |
dc.contributor.author | Gorbunov, Mikhail V. | |
dc.contributor.author | Mikhailova, Daria | |
dc.contributor.author | Abakumov, Artem M. | |
dc.date.accessioned | 2022-01-10T15:19:22Z | |
dc.date.available | 2022-01-10T15:19:22Z | |
dc.date.issued | 2021 | |
dc.description.abstract | Na9V14O35 (η-NaxV2O5) has been synthesized via solid-state reaction in an evacuated sealed silica ampoule and tested as electroactive material for Na-ion batteries. According to powder X-ray diffraction, electron diffraction and atomic resolution scanning transmission electron microscopy, Na9V14O35 adopts a monoclinic structure consisting of layers of corner- and edge-sharing VO5 tetragonal pyramids and VO4 tetrahedra with Na cations positioned between the layers, and can be considered as sodium vanadium(IV,V) oxovanadate Na9V104.1+O19(V5+O4)4. Behavior of Na9V14O35 as a positive and negative electrode in Na half-cells was investigated by galvanostatic cycling against metallic Na, synchrotron powder X-ray diffraction and electron energy loss spectroscopy. Being charged to 4.6 V vs. Na+/Na, almost 3 Na can be extracted per Na9V14O35 formula, resulting in electrochemical capacity of ~60 mAh g−1. Upon discharge below 1 V, Na9V14O35 uptakes sodium up to Na:V = 1:1 ratio that is accompanied by drastic elongation of the separation between the layers of the VO4 tetrahedra and VO5 tetragonal pyramids and volume increase of about 31%. Below 0.25 V, the ordered layered Na9V14O35 structure transforms into a rock-salt type disordered structure and ultimately into amorphous products of a conversion reaction at 0.1 V. The discharge capacity of 490 mAh g−1 delivered at first cycle due to the conversion reaction fades with the number of charge-discharge cycles. | eng |
dc.description.version | publishedVersion | eng |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/7806 | |
dc.identifier.uri | https://doi.org/10.34657/6847 | |
dc.language.iso | eng | eng |
dc.publisher | Basel : MDPI | eng |
dc.relation.doi | https://doi.org/10.3390/molecules27010086 | |
dc.relation.essn | 1420-3049 | |
dc.relation.ispartofseries | Molecules 27 (2021), Nr. 1 | eng |
dc.rights.license | CC BY 4.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | eng |
dc.subject | Na-ion batteries | eng |
dc.subject | sodium-vanadium bronzes | eng |
dc.subject | electrochemical cycling | eng |
dc.subject.ddc | 540 | eng |
dc.title | Sodium-Vanadium Bronze Na9V14O35: An Electrode Material for Na-Ion Batteries | eng |
dc.type | article | eng |
dc.type | Text | eng |
dcterms.bibliographicCitation.journalTitle | Molecules | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | IFWD | eng |
wgl.subject | Chemie | eng |
wgl.type | Zeitschriftenartikel | eng |
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