Abstract
The uniform and completed nanofilms of nickel oxide (NiO) were electrodeposited on the carbon fibers (CFs) by a facile method of cyclic voltammetric. The as-prepared NiO/CFs composites can be used as a flexible electrode for electrochemical supercapacitors. Electrochemical measurements showed that 1.0-NiO/CFs had a good redox process and reversibility, and displayed the specific capacitances as high as 929 F g−1 at a current density of 1 A g−1. After 5000 cycles of charge and discharge, the 1.0-NiO/CFs composite materials could retain more than 88% of initial capacitance and show an excellent cyclability. Meanwhile, this supercapacitor exhibited a higher energy density of 20.8 Wh kg−1 at a power density of 200 W kg−1. The carbon fibers acting as active substrate for the composite electrode are a good conductor and have a larger capacitance of electrical double layer. The nanofilm structure of NiO could facilitate the contact of the electrolyte with the active materials, thus increasing the Faradaic pseudo-capacitance.
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We acknowledge support from Doctor Foundation of Shandong Jianzhu University (XNBS 1434).
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Xiang, D., Liu, X. & Dong, X. A facile synthetic method and electrochemical performances of nickel oxide/carbon fibers composites. J Mater Sci 52, 7709–7718 (2017). https://doi.org/10.1007/s10853-017-1019-4
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DOI: https://doi.org/10.1007/s10853-017-1019-4