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; Sam S. 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, Sam S. Yoon

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

21 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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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.",

author = "Edmund Samuel and Londhe, {Priyanka U.} and Bhavana Joshi and Kim, {Min Woo} and Karam Kim and Swihart, {Mark T.} and Chaure, {Nandu B.} and Yoon, {Sam S.}",

note = "Funding Information: This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2016M1A2A2936760). This research was also supported by NRF-2013M3A6B1078879, NRF-2017R1A2B4005639, and NRF-2016R1A2B3009481. Funding Information: This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation ( NRF ) funded by the Ministry of Science, ICT & Future Planning ( NRF-2016M1A2A2936760 ). This research was also supported by NRF - 2013M3A6B1078879 , NRF - 2017R1A2B4005639 , and NRF - 2016R1A2B3009481 . Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

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doi = "10.1016/j.jallcom.2017.12.320",

language = "English",

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journal = "Journal of Alloys and Compounds",

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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, Sam S.

N1 - Funding Information: This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2016M1A2A2936760). This research was also supported by NRF-2013M3A6B1078879, NRF-2017R1A2B4005639, and NRF-2016R1A2B3009481. Funding Information: This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation ( NRF ) funded by the Ministry of Science, ICT & Future Planning ( NRF-2016M1A2A2936760 ). This research was also supported by NRF - 2013M3A6B1078879 , NRF - 2017R1A2B4005639 , and NRF - 2016R1A2B3009481 . Publisher Copyright: © 2018 Elsevier B.V.

PY - 2018/4/15

Y1 - 2018/4/15

N2 - 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.

AB - 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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Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors

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