Asymmetric supercapacitor based on carbon nanofibers as the anode and two-dimensional copper cobalt oxide nanosheets as the cathode

被引：0
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作者：
Suresh Babu, R. [1 ]
Vinodh, R. [2 ]
de Barros, A.L.F. [1 ]
Samyn, L.M. [1 ]
Prasanna, K. [3 ]
Maier, M.A. [1 ]
Alves, C.H.F. [4 ]
Kim, Hee-Je [2 ]
机构：
[1] Laboratory of Experimental and Applied Physics, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã Campus 229, Rio de Janeiro,20271-110, Brazil
[2] School of Electrical and Computer Engineering, Pusan National University, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan,46241, Korea, Republic of
[3] Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, P.O. Box 49, Roskilde,DK-4000, Denmark
[4] Department of Electrical Engineering, Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Av. Maracanã Campus 229, Rio de Janeiro,20271-110, Brazil
来源：
Chemical Engineering Journal | 2020年 / 366卷
关键词：
This paper reports the fabrication of an ultra-high energy and power density asymmetric supercapacitor (ASC) containing a novel porous carbon nanofiber derived from hypercross-linked polymers (HCP-CNF) and two-dimensional copper cobalt oxide nanosheets (CCO-NS) as the negative and positive electrodes; respectively. The micropore-enriched HCP-CNF is obtained from a facile Friedel-Crafts reaction with naphthalene and α; α′-dichloro-p-xylene as the starting material. The CCO-NS have been prepared by a simple and inexpensive hydrothermal synthesis using polyvinylpyrrolidone (PVP) as a shape controlling agent. The fabricated CCO-NS//HCP-CNF ASC device exhibit a high specific capacitance; 244 F g−1 at a current density of 1 A g−1; owing to the unique porous architecture of CCO-NS and the interconnected microporous carbon skeleton with a high surface area of HCP-CNF. Furthermore; the assembled ASC device show an ultra-high energy density of 25.1 Wh kg−1 at a power density of 400 W kg−1 with maximum operating voltage of 1.60 V. The electrode shows good capacitance retention (91.1%) after 5000 cycles in a 3 M aqueous KOH solution. In addition; two ASC devices are connected in series powered a 5 mm diameter LED indicator for approximately 30 min; highlighting its efficient power supply. © 2019 Elsevier B.V;
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页码：390 / 403
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