In Operando Synchrotron Diffraction and in Operando X-ray Absorption Spectroscopy Investigations of Orthorhombic V2O5 Nanowires as Cathode Materials for Mg-Ion Batteries

被引：101

作者：

Fu, Qiang ^{[1
]}

Sarapulova, Angelina ^{[1
]}

Trouillet, Vanessa ^{[1
,3
]}

Zhu, Lihua ^{[1
]}

Fauth, Francois ^{[4
]}

Mangold, Stefan ^{[5
]}

Welter, Edmund ^{[6
]}

Indris, Sylvio ^{[1
,2
]}

Knapp, Michael ^{[1
,2
]}

Dsoke, Sonia ^{[1
,2
]}

Bramnik, Natalia ^{[1
]}

Ehrenberg, Helmut ^{[1
,2
]}

机构：

[1] Karlsruhe Inst Technol, IAM, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Helmholtz Inst Ulm Electrochem Energy Storage HIU, Helmholtzstr 11, D-89081 Ulm, Germany

[3] Karlsruhe Inst Technol, KNMF, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[4] CELLS ALBA Synchrotron, E-08290 Barcelona, Spain

[5] Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[6] DESY, Notkestr 85, D-22607 Hamburg, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2019年 / 141卷 / 06期

关键词：

SITU POWDER DIFFRACTION; ELECTROCHEMICAL INSERTION; RECHARGEABLE LI; MAGNESIUM; INTERCALATION; ELECTROLYTES; ELECTRODES; TRANSFORMATION; PERFORMANCE; COMPOSITES;

D O I：

10.1021/jacs.8b08998

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 approximate to 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.

引用

页码：2305 / 2315

页数：11

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