Microwave-assisted hydrothermal synthesis of V{sub 2}O{sub 5} nanorods assemblies with an improved Li-ion batteries performance

Journal Article · Mon Feb 15 04:00:00 EST 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2015.10.020· OSTI ID:22584290

Pan, Jing; Li, Ming; Luo, Yuanyuan; Wu, Hao; Zhong, Li; Wang, Qiang ^[1]; Li, Guanghai ^[1]

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1. Key Laboratory of Materials Physics, and Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)

Highlights: • V{sub 2}O{sub 5} nanorods and their assemblies were synthesized by microwave way. • Electrochemical performance in Li-ion batteries was studied. • CV has revealed reversible redox behavior with charge–discharge cycling. • V{sub 2}O{sub 5} nanorods assemblies show superior initial discharge capacity. • Low polarization of charge transfer reaction determines the enhanced capacity. - Abstract: Vanadium pentoxide nanorods assemblies were synthesized by a microwave-assisted hydrothermal synthesis, combined with subsequently annealing treatment. The structure and morphology of the nanorods were characterized by XRD, FESEM and HRTEM, and the electrochemical properties of the electrodes made from the V{sub 2}O{sub 5} nanorods were investigated. The V{sub 2}O{sub 5} nanorods with an average diameter of 100 nm and lengths up to several micrometers are almost parallel distributed in the assemblies. The V{sub 2}O{sub 5} nanorods assemblies exhibit an initial discharge capacity of 330 mAh g{sup −1} at a current density of 50 mA g{sup −1}, which is very higher than that of the separated V{sub 2}O{sub 5} nanorods. The V{sub 2}O{sub 5} nanorods assemblies also show a lower capacity fading rate in comparison with the separated V{sub 2}O{sub 5} nanorods. A low polarization of the charge transfer reaction and a high diffusion rate of lithium ion inside the electrode composed of the paralleled nanorods are considered responsible for the enhanced capacity.

• OSTI ID: 22584290
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 74; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
CURRENT DENSITY
DIFFUSION
ELECTRIC CURRENTS
ELECTROCHEMISTRY
ELECTRODES
ENERGY STORAGE
HYDROTHERMAL SYNTHESIS
LITHIUM ION BATTERIES
MICROWAVE RADIATION
MORPHOLOGY
NANOSTRUCTURES
POLARIZATION
TRANSMISSION ELECTRON MICROSCOPY
VANADIUM OXIDES
X-RAY DIFFRACTION