Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors

Edmund Samuel, Priyanka U. Londhe, Bhavana Joshi, Min Woo Kim, Karam Kim, Mark T. Swihart, Nandu B. Chaure, Suk Goo Yoon

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 67 mWh·cm−3 and power density of 6000 mW·cm−3. The composite also showed good long-term cycling performance, retaining 90% of its capacitance after 1000 galvanostatic charge/discharge cycles.

Original languageEnglish
Pages (from-to)781-791
Number of pages11
JournalJournal of Alloys and Compounds
Volume741
DOIs
Publication statusPublished - 2018 Apr 15

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Graphite
Graphene
Nanoparticles
Composite materials
X ray diffraction analysis
Binders
Nanocomposites
Capacitance
Agglomeration
Scanning electron microscopy
Electrodes
Supercapacitor

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors. / Samuel, Edmund; Londhe, Priyanka U.; Joshi, Bhavana; Kim, Min Woo; Kim, Karam; Swihart, Mark T.; Chaure, Nandu B.; Yoon, Suk Goo.

In: Journal of Alloys and Compounds, Vol. 741, 15.04.2018, p. 781-791.

Research output: Contribution to journalArticle

Samuel, E, Londhe, PU, Joshi, B, Kim, MW, Kim, K, Swihart, MT, Chaure, NB & Yoon, SG 2018, 'Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors', Journal of Alloys and Compounds, vol. 741, pp. 781-791. https://doi.org/10.1016/j.jallcom.2017.12.320
Samuel, Edmund ; Londhe, Priyanka U. ; Joshi, Bhavana ; Kim, Min Woo ; Kim, Karam ; Swihart, Mark T. ; Chaure, Nandu B. ; Yoon, Suk Goo. / Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors. In: Journal of Alloys and Compounds. 2018 ; Vol. 741. pp. 781-791.
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