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

doi:10.1016/j.jallcom.2017.12.320

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

Department of Mechanical Engineering

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	781-791
Number of pages	11
Journal	Journal of Alloys and Compounds
Volume	741
DOIs	https://doi.org/10.1016/j.jallcom.2017.12.320
Publication status	Published - 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

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title = "Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors",

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.",

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AU - Samuel, Edmund

AU - Londhe, Priyanka U.

AU - Joshi, Bhavana

AU - Kim, Min Woo

AU - Kim, Karam

AU - Swihart, Mark T.

AU - Chaure, Nandu B.

AU - Yoon, Suk Goo

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