Reddy, M. Anji ; Euchner, Holger ; Witter, Raiker ; Clemens, Oliver (2018)
Structure and electrochemical properties of Na2±xV3P2O13 (x = 0 and 1): a promising cathode material for sodium-ion batteries.
In: Journal of Materials Chemistry A, 6 (16)
doi: 10.1039/C8TA00588E
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Owing to the large abundance of sodium resources and its low cost, sodium-ion batteries (NIBs) are being considered as a promising, feasible alternative to lithium-ion batteries (LIBs), notably for stationary applications. Research activities on sodium-ion batteries are growing worldwide but do still require a great deal of basic and applied research. The design and synthesis of new cathode materials are of great interest to realize the structural requirements to build sustainable and safe NIBs. Herein, we report the synthesis, structure and electrochemical properties of sodium vanadium oxy-phosphate (NVOP), Na2±xV3P2O13 (x = 0 and 1), a stable host for the reversible insertion of sodium. Na3V3P2O13 delivers a reversible capacity of 132 mA h g−1 at an average potential of 2.7 V vs. Na/Na+, which amounts to a specific energy of 356 W h kg−1. Furthermore, NVOP compounds exhibit excellent cycling stability. Besides, NVOP shows a rich structural chemistry during the sodium insertion and deinsertion process. A reversible switching of V5+ and V4+ between two crystallographic sites during sodiation and desodiation reactions was observed, hitherto unknown in battery materials. Na2±xV3P2O13 (x = 0 and 1) compounds were characterized by various experimental tools to understand the structure and related properties. In addition, density functional theory (DFT) calculations were performed to complement experimental observations and to understand sodium diffusion behavior in Na2±xV3P2O13 (x = 0 and 1).
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Reddy, M. Anji ; Euchner, Holger ; Witter, Raiker ; Clemens, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Structure and electrochemical properties of Na2±xV3P2O13 (x = 0 and 1): a promising cathode material for sodium-ion batteries |
| Sprache: | Englisch |
| Publikationsjahr: | 28 April 2018 |
| Verlag: | Royal Society of Chemistry |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Chemistry A |
| Jahrgang/Volume einer Zeitschrift: | 6 |
| (Heft-)Nummer: | 16 |
| DOI: | 10.1039/C8TA00588E |
| URL / URN: | https://doi.org/10.1039/C8TA00588E |
| Kurzbeschreibung (Abstract): | Owing to the large abundance of sodium resources and its low cost, sodium-ion batteries (NIBs) are being considered as a promising, feasible alternative to lithium-ion batteries (LIBs), notably for stationary applications. Research activities on sodium-ion batteries are growing worldwide but do still require a great deal of basic and applied research. The design and synthesis of new cathode materials are of great interest to realize the structural requirements to build sustainable and safe NIBs. Herein, we report the synthesis, structure and electrochemical properties of sodium vanadium oxy-phosphate (NVOP), Na2±xV3P2O13 (x = 0 and 1), a stable host for the reversible insertion of sodium. Na3V3P2O13 delivers a reversible capacity of 132 mA h g−1 at an average potential of 2.7 V vs. Na/Na+, which amounts to a specific energy of 356 W h kg−1. Furthermore, NVOP compounds exhibit excellent cycling stability. Besides, NVOP shows a rich structural chemistry during the sodium insertion and deinsertion process. A reversible switching of V5+ and V4+ between two crystallographic sites during sodiation and desodiation reactions was observed, hitherto unknown in battery materials. Na2±xV3P2O13 (x = 0 and 1) compounds were characterized by various experimental tools to understand the structure and related properties. In addition, density functional theory (DFT) calculations were performed to complement experimental observations and to understand sodium diffusion behavior in Na2±xV3P2O13 (x = 0 and 1). |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialdesign durch Synthese |
| Hinterlegungsdatum: | 12 Dez 2018 08:21 |
| Letzte Änderung: | 12 Dez 2018 08:21 |
| PPN: | |
| Sponsoren: | We are greatly thankful to Estonian Research Council, Tallinn University of Technology and the National Institute of Chemical Physics and Biophysics (KBFI), H. E. acknowledges the computer time supported by the state of Baden-W ̈ urttemberg through the bwHPC project and the German Research Foundation (DFG) through grant number INST 40/467-1 FUGG., O. C. acknowledges funding by DFG within CL551/2-1. |
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