Issue 2, 2020

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

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

Supplementary files

Article information

Article type
Paper
Submitted
13 2 2020
Accepted
14 4 2020
First published
14 4 2020
This article is Open Access
Creative Commons BY license

Mater. Adv., 2020,1, 215-227

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

D. Sridhar, H. Yu, J. Meunier and S. Omanovic, Mater. Adv., 2020, 1, 215 DOI: 10.1039/D0MA00023J

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