Carbon nano-onions from waste oil for application in energy storage devices
- Authors
- Jung, SungHoon; Myung, Yusik; Das, Gouri Sankar; Bhatnagar, Amit; Park, Jun-Woo; Tripathi, Kumud Malika; Kim, TaeYoung
- Issue Date
- May-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NEW JOURNAL OF CHEMISTRY, v.44, no.18, pp.7369 - 7375
- Journal Title
- NEW JOURNAL OF CHEMISTRY
- Volume
- 44
- Number
- 18
- Start Page
- 7369
- End Page
- 7375
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/50854
- DOI
- 10.1039/d0nj00699h
- ISSN
- 1144-0546
- Abstract
- As the demand for long-term, sustainable, and durable energy storage devices has been increasing, it is important to develop high performance carbon-based electrode materials for energy storage devices using simple, economical, and green techniques. The present study proposes an environment-friendly approach for facile, large-scale synthesis of onion-like carbon nano-particles (CNOs) for their application in high-performance and durable supercapacitors (SCs). CNOs were synthesized by a traditional wick pyrolysis technique using waste frying oil as the free carbon source. The as-synthesized CNO particles were connected to each other to form a chain-like interconnected network, effectively providing accelerated ion-transport, reduced resistance for electron transport and more active sites for charge storage. SCs based on activated CNOs (a-CNOs) demonstrated a gravimetric capacitance of 71 F g(-1) in organic electrolytes at a current density of 2 A g(-1). Moreover, a-CNOs delivered good volumetric capacitance of 63 F cm(-3) with a high packing density of similar to 0.89 g cm(-3), which is higher than that of the commercial activated carbon. Furthermore, the capacitance retention was similar to 80% even after 10 000 galvanostatic charge discharge cycles. Overall, this work presents a method to produce a new type of carbon-based electrode materials from wastes for high performance energy storage devices.
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