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In relation to this article, we declare that there is no conflict of interest.
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Received October 16, 2018
Accepted November 25, 2018
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Mesoporous carbon nanofiber engineered for improved supercapacitor performance

Department of Chemical Engineering, Chungbuk National University, Chungbuk 28644, Korea 1Surface and Nanoscience Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute, Kalpakkam, Tamil Nadu- 603102, India 2Department of Environmental Engineering, Chungbuk National University, Chungbuk 28644, Korea
kujie@naver.com
Korean Journal of Chemical Engineering, February 2019, 36(2), 312-320(9), 10.1007/s11814-018-0199-1
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Abstract

Carbon nanofiber is a well-known carbon nanostructure employed in flexible supercapacitor electrode. Despite recent developments, improvement in the performance of carbon nanofiber-based electrode is still the subject of intense research. We investigated the supercapacitor performance of porosity-induced carbon nanofibers (CNFs). The fabrication process involves electrospinning, calcination, and subsequent etching. The porous CNF not only delivers a higher capacitance of 248 F/g at a current density of 1 A/g, but also exhibits a higher rate performance of 73.54%, lower charge transfer resistance and only 1.1% capacitance loss after 2000 charge-discharge cycles, compared to pristine CNF. The excellent electrochemical behavior of porous CNF is correlated with the degree of graphitization, a higher volume of mesopores, and enhanced surface area. The as-fabricated symmetric device comprising porous CNF exhibits an energy density of 9.9Wh/kg, the power density of 0.69 kW/kg and capacitance retention of 89% after 5000 charge-discharge cycles. The introduction of porosity in CNFs is a promising strategy to achieve high-performance supercapacitor electrode.

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