Journal
NEW JOURNAL OF CHEMISTRY
Volume 44, Issue 18, Pages 7369-7375Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj00699h
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Funding
- Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2016M3A7B4027712]
- Gachon University Research Fund of 2019 [GCU-2019-0317]
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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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