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Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors

Authors
Samuel, EdmundLondhe, Priyanka U.Joshi, BhavanaKim, Min-WooKim, KaramSwihart, Mark T.Chaure, Nandu B.Yoon, Sam S.
Issue Date
15-4월-2018
Publisher
ELSEVIER SCIENCE SA
Citation
JOURNAL OF ALLOYS AND COMPOUNDS, v.741, pp.781 - 791
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF ALLOYS AND COMPOUNDS
Volume
741
Start Page
781
End Page
791
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/76131
DOI
10.1016/j.jallcom.2017.12.320
ISSN
0925-8388
Abstract
A binder-free nanocomposite consisting of ZnO nanoparticles (NPs) grown directly on graphene sheets by electrospraying was fabricated for use as an electrode material in supercapacitors. The optimal concentrations of graphene and ZnO NPs were determined from the capacitive characteristics of the composite. Scanning electron microscopy confirmed that the ZnO NPs grew in a uniformly distributed manner on the graphene sheets and that they exhibited negligible agglomeration. Further, X-ray diffraction analysis confirmed that ZnO growth was preferentially oriented along (100) plane in the ZnO/graphene composite. A symmetric supercapacitor fabricated using this composite exhibited an energy density of 67mWh.cm(-3) and power density of 6000mW.cm(-3). The composite also showed good long-term cycling performance, retaining 90% of its capacitance after 1000 galvanostatic charge/discharge cycles. (C) 2018 Elsevier B.V. All rights reserved.
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