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
Rok vydání: 2019
Předmět:
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