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

9 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

ASJC Scopus subject areas

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

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    Samuel, E., Londhe, P. U., Joshi, B., Kim, M. W., Kim, K., Swihart, M. T., Chaure, N. B., & Yoon, S. G. (2018). Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors. Journal of Alloys and Compounds, 741, 781-791. https://doi.org/10.1016/j.jallcom.2017.12.320