In Operando Synchrotron Diffraction and in Operando X-ray Absorption Spectroscopy Investigations of Orthorhombic V2O5 Nanowires as Cathode Materials for Mg-Ion Batteries
| Autor: | Sonia Dsoke, Sylvio Indris, Lihua Zhu, Vanessa Trouillet, Helmut Ehrenberg, Natalia Bramnik, Angelina Sarapulova, Qiang Fu, François Fauth, Edmund Welter, Michael Knapp, Stefan Mangold |
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| Rok vydání: | 2019 |
| Předmět: |
X-ray absorption spectroscopy
Absorption spectroscopy Chemistry Nanowire Analytical chemistry General Chemistry 010402 general chemistry 01 natural sciences Biochemistry Catalysis Cathode 0104 chemical sciences Anode law.invention symbols.namesake Colloid and Surface Chemistry X-ray photoelectron spectroscopy law symbols Orthorhombic crystal system Raman spectroscopy |
| Zdroj: | Journal of the American Chemical Society. 141:2305-2315 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Orthorhombic V2O5 nanowires were successfully synthesized via a hydrothermal method. A cell-configuration system was built utilizing V2O5 as the cathode and 1 M Mg(ClO4)2 electrolyte within acetonitrile, together with MgxMo6S8 (x ≈ 2) as the anode to investigate the structural evolution and oxidation state and local structural changes of V2O5. The V2O5 nanowires deliver an initial discharge/charge capacity of 103 mAh g–1/110 mAh g–1 and the highest discharge capacity of 130 mAh g–1 in the sixth cycle at C/20 rate in the cell-configuration system. In operando synchrotron diffraction and in operando X-ray absorption spectroscopy together with ex situ Raman and X-ray photoelectron spectroscopy reveal the reversibility of magnesium insertion/extraction and provide information on the crystal structure evolution and changes of the oxidation states during cycling. |
| Databáze: | OpenAIRE |
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