Journal
ELECTROCHIMICA ACTA
Volume 213, Issue -, Pages 124-131Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.07.104
Keywords
Core-sheath structure; Polyaniline; In situ polymerization; Electrospinning; Supercapacitor
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Funding
- National Research Foundation of Korea [NRF-2015R1A4A1042434]
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Nylon 6,6/PANI nanofibers using electrospun nylon 6,6 nanofibers as a template are synthesized by the in situ polymerization of different aniline concentrations for the preparation of all-polymer based core-sheath nanofibers with high electrochemical and mechanical properties, such as lightness and flexibility. These nylon 6,6/PANI based sheath nanofibers are used as electrode materials for supercapacitors. The electrochemical performance is examined by cyclic voltammetry (CV), galvanostatic charge/discharge tests and electrochemical impedance spectroscopy (EIS). The galvanostatic charge/discharge test reveals the highest specific capacitance of 665 F g(-1) at a current density of 1 A g(-1). This electrode also shows remarkable rate charge/discharge capability and high cyclic stability (62% after 1000 cycles). In addition, the high energy density of the nylon 6,6/PANI composite electrode can reach 91 W h kg(-1) at a power density of 500 W kg(-1). The superior electrochemical properties of the core-sheath nylon 6,6/PANI nanofibers are attributed to their core-sheath structure, thin wall thickness and uniform wall distribution, which can improve the performance of electroactive PANI during the charge/discharge process. The good electrochemical performances highlight the potential of the nylon 6,6/PANI electrode as an electrode material for high-performance supercapacitors. (C) 2016 Elsevier Ltd. All rights reserved.
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