Nano ZnO@reduced graphene oxide composite for high performance supercapacitor: Green synthesis in supercritical fluid

Title
Nano ZnO@reduced graphene oxide composite for high performance supercapacitor: Green synthesis in supercritical fluid
Author(s)
할도리유바라즈Walter Voit[Walter Voit]심재진
Keywords
FEW-LAYER GRAPHENE; ROOM-TEMPERATURE; RAMAN-SPECTRA; SENSOR APPLICATIONS; CARBON NANOTUBES; GRAPHITE OXIDE; ZINC-OXIDE; GAS-SENSOR; STEM-CELLS; FILMS
Issue Date
201402
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.120, pp.65 - 72
Abstract
In this report, zinc oxide nanoparticles (ZnO NPs) decorated reduced graphene oxide (RGO) composite was fabricated by a one-pot approach using supercritical carbon dioxide (scCO(2)). ScCO2 has gas-like diffusivity, extremely low viscosity, and excellent penetration ability, allowing it to debundle RGO nanosheets and disperse ZnO NPs in between. Owing to the near-zero surface tension and excellent wetting ability of scCO(2), the NPs are tightly coated on the highly conductive RGO sheets. The electrochemical characteristics of the ZnO/RGO composite were investigated through cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The composite was capable of delivering a high-specific capacitance of 314 F g(-1) with excellent cycling stability. (C) 2013 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/33158http://dx.doi.org/10.1016/j.electacta.2013.12.063
ISSN
0013-4686
Appears in Collections:
공과대학 > 화학공학부 > Articles
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