One-step hydrothermal synthesis of Graphene decorated V2O5 nanobelts for enhanced electrochemical energy storage

Minoh Lee, Suresh Kannan Balasingam, Hu Young Jeong, Won G. Hong, Han Bo Ram Lee, Byung Hoon Kim, Yongseok Jun

Research output: Contribution to journalArticle

119 Citations (Scopus)

Abstract

Graphene-decorated V2O5 nanobelts (GVNBs) were synthesized via a low-temperature hydrothermal method in a single step. V2O5 nanobelts (VNBs) were formed in the presence of graphene oxide, a mild oxidant, which also enhanced the conductivity of GVNBs. From the electron energy loss spectroscopy analysis, the reduced graphene oxide (rGO) are inserted into the layered crystal structure of V2O5 nanobelts, which further confirmed the enhanced conductivity of the nanobelts. The electrochemical energy-storage capacity of GVNBs was investigated for supercapacitor applications. The specific capacitance of GVNBs was evaluated using cyclic voltammetry (CV) and charge/discharge (CD) studies. The GVNBs having V2O5-rich composite, namely, V3G1 (VO/GO 5 351), showed superior specific capacitance in comparison to the other composites (V1G1 and V1G3) and the pure materials. Moreover, the V3G1 composite showed excellent cyclic stability and the capacitance retention of about 82% was observed even after 5000 cycles.

Original languageEnglish
Article number08151
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 2015 Jan 30
Externally publishedYes

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Nanobelts
Graphite
Hydrothermal synthesis
Energy storage
Capacitance
Oxides
Composite materials
vanadium pentoxide
Electron energy loss spectroscopy
Oxidants
Cyclic voltammetry
Crystal structure

ASJC Scopus subject areas

  • General

Cite this

One-step hydrothermal synthesis of Graphene decorated V2O5 nanobelts for enhanced electrochemical energy storage. / Lee, Minoh; Balasingam, Suresh Kannan; Jeong, Hu Young; Hong, Won G.; Lee, Han Bo Ram; Kim, Byung Hoon; Jun, Yongseok.

In: Scientific reports, Vol. 5, 08151, 30.01.2015.

Research output: Contribution to journalArticle

Lee, Minoh ; Balasingam, Suresh Kannan ; Jeong, Hu Young ; Hong, Won G. ; Lee, Han Bo Ram ; Kim, Byung Hoon ; Jun, Yongseok. / One-step hydrothermal synthesis of Graphene decorated V2O5 nanobelts for enhanced electrochemical energy storage. In: Scientific reports. 2015 ; Vol. 5.
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AU - Lee, Han Bo Ram

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