Researches on the structure and electrochemical properties of MoxV2-xO5+y nanosheets

• Published in: Ionics 2017-10, Vol.23 (10), p.2855-2862
• Main Authors: Lu, Shan, Xue, Zhongdan, Chen, Yuqing, Wan, Fangchao, Zhu, Quanyao, Zakharova, Galina S.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrochemistry; Energy Storage; Interlayers; Nanocomposites; Nanosheets; Nanostructure; Optical and Electronic Materials; Original Paper; Phase (cyclic); Renewable and Green Energy; Sol-gel processes; Vanadium pentoxide; X ray photoelectron spectroscopy; X-rays
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-016-1949-x

Vanadium pentoxide (V 2 O 5 ) with various nanostructures has been investigated during the past decades. Notably, two-dimensional V 2 O 5 nanosheets had attracted most attentions due to the large mass density. Here, the V 2 O 5 nanosheets doped by MoO 3 (Mo x V 2-x O 5+y ) have been synthesized by sol-gel method combined with freezing–drying process. The structures and morphology of Mo x V 2-x O 5+y were characterized by XRD, FTIR, TEM, and FESEM analysis. The Mo x V 2-x O 5+y show a two-dimensional layered structure and the XRD can be indexed to an orthorhombic V 2 O 5 phase. Meanwhile, the doping of MoO 3 was confirmed by the XPS and TEM analysis. The electrochemical behaviors of the nanocomposites were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge test. As a result, the interlayer spacing of the Mo x V 2-x O 5+y nanosheets were inlarged by V 2 MoO 8 . The improvment of electrochemical properties was due to defects and the layer structure.