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Volume 7, Issue 4(Suppl)
J Nanomed Nanotechnol
ISSN: 2157-7439 JNMNT, an open access journal
Page 66
Notes:
Nano Congress 2016
August 01-02, 2016
conferenceseries
.com
August 01-02, 2016 Manchester, UK
9
th
Nano Congress for Next Generation
Porous graphene aerogel supercapacitors
Hyun Young Jung
1
and
Sung Mi Jung
2
1
Gyeongnam National University of Science and Technology, Korea
2
Massachusetts Institute of Technology, USA
G
raphene sheets derived from electrochemical exfoliation have shown more pristine qualities such as better electrical properties
than those derived from reduced graphene oxide (rGO). In this work, we developed porous 3D structures using graphene
obtained via electrochemical exfoliation and explored their application as supercapacitor electrodes. By adjusting the content of the
electrolyte in the exfoliation process, the aspect ratio of graphene sheets and the porosity of the graphene network can be optimized.
Furthermore, the freezing temperature in the freeze drying step was also found to play a critical role in the resulting pore size
distributions of the porous networks. The optimized conditions lead to meso- and macro-porous graphene aerogels with high surface
area, extremely low densities and superior electrical properties. As a result, we have found that the graphene aerogel supercapacitors
exhibit a specific capacitance of 325 F/g at 1 A/g and an energy density of 45 Wh/kg in 0.5 M H
2
SO
4
aqueous electrolyte with high
electrochemical stability required for the practical usage. This research provides a practical method for lightweight, high-performance
and low-cost materials in the effective use of energy storage systems.
Biography
Hyun Young Jung is now an Assistant Professor in the Department of Energy Engineering at the Gyeongnam National University of Science and Technology in
Korea. His ongoing researches focus on energy conversion and storage devices of engineered nanomaterials and composites, aerogel for energy and environment,
and optoelectronics. He has published more than 33 papers in reputed journals.
hyjung@gntech.ac.krHyun Young Jung et al., J Nanomed Nanotechnol 2016, 7:4 (Suppl)
http://dx.doi.org/10.4172/2157-7439.C1.041