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Carbon nano-fiber forest foundation for ruthenium oxide pseudo-electrochemical capacitors

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Abstract

Ruthenium oxide was coated on directly grown carbon nano-fibers (CNF) on nickel foam current collectors at different coating temperatures. The extended surface area and the porous nature of the CNF forest along with the pseudo-capacitance nature of ruthenium oxide enhanced the performance of the electrodes. As the ruthenium oxide coating temperature played a vital role in the charge storage process, an ideal temperature for the oxide formation was determined to optimize the capacitance and stability. Using 6 M KOH as the electrolyte, these samples showed a high aerial capacitance of 822 ± 04 mF cm−2 at a current density of 20 mA cm−2 and retained 94% of its initial capacitance after 5000 charge–discharge cycles. The maximum energy and power density measured were 362 mW h m−2 and 957 kW m−2 respectively. Considering the facileness and the high-performance metrics, this process is easy to scale-up and the electrodes are promising for high-power supercapacitors.

Graphical abstract: Carbon nano-fiber forest foundation for ruthenium oxide pseudo-electrochemical capacitors

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Supplementary files

Article information


Submitted
13 Feb 2020
Accepted
14 Apr 2020
First published
14 Apr 2020

This article is Open Access

Mater. Adv., 2020, Advance Article
Article type
Paper

Carbon nano-fiber forest foundation for ruthenium oxide pseudo-electrochemical capacitors

D. Sridhar, H. Yu, J. Meunier and S. Omanovic, Mater. Adv., 2020, Advance Article , DOI: 10.1039/D0MA00023J

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