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Supercapacitor Electrode Based on Activated Carbon Wool Felt

1
Área Fisicoquímica, DETEMA, Facultad de Química, Universidad de la República, Montevideo 11200, Uruguay
2
Instituto Nacional de Pesquisas Espaciais—INPE, São José dos Campos 12227-010, Brazil
3
Instituto Tecnológico de Aeronáutica—ITA, São José dos Campos 12228-900, Brazil
*
Author to whom correspondence should be addressed.
Received: 1 March 2018 / Revised: 9 April 2018 / Accepted: 11 April 2018 / Published: 16 April 2018
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Abstract

An electrical double-layer capacitor (EDLC) is based on the physical adsorption/desorption of electrolyte ions onto the surface of electrodes. Due to its high surface area and other properties, such as electrochemical stability and high electrical conductivity, carbon materials are the most widely used materials for EDLC electrodes. In this work, we study an activated carbon felt obtained from sheep wool felt (ACF’f) as a supercapacitor electrode. The ACF’f was characterized by elemental analysis, scanning electron microscopy (SEM), textural analysis, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the ACF’f was tested in a two-electrode Swagelok®-type, using acidic and basic aqueous electrolytes. At low current densities, the maximum specific capacitance determined from the charge-discharge curves were 163 F·g−1 and 152 F·g−1, in acidic and basic electrolytes, respectively. The capacitance retention at higher current densities was better in acidic electrolyte while, for both electrolytes, the voltammogram of the sample presents a typical capacitive behaviour, being in accordance with the electrochemical results. View Full-Text
Keywords: activated carbon fibres; wool; supercapacitor electrode activated carbon fibres; wool; supercapacitor electrode
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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MDPI and ACS Style

Pina, A.C.; Amaya, A.; Marcuzzo, J.S.; Rodrigues, A.C.; Baldan, M.R.; Tancredi, N.; Cuña, A. Supercapacitor Electrode Based on Activated Carbon Wool Felt. C 2018, 4, 24.

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