Influence of aqueous and glycerol-based electrolytes on the performance of activated carbon fiber-felt electrodes for supercapacitors
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2022
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
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Due to the rising demand for energy consumption and the development of new energy sources,
energy storage devices are needed for balancing energy supply and demand. Among the different
types of energy storage systems, electrochemical supercapacitors have received great attention
owing to their advantages of long cycle life, high power density, fast charge-discharge rates, and
safe operation. This work addresses these storage devices and has been divided into two parts,
namely: (1) Production and characterization of activated carbon fiber-felt electrodes from textile
PAN fiber and (2) Electrochemical characterization of electrodes in aqueous and glycerol-based
KOH electrolytes. In the former, the manufacturing method of activated carbon fiber-felt electrodes
has been provided. Pre-oxidized textile PAN-fiber felt underwent four main processes: (a) Drying at
125°C, (b) Overoxidation at 250°C, (c) Carbonization under an inert atmosphere at 900°C, and (d)
Physical activation under an oxidizing atmosphere at 1000°C. Surface morphology, porosity
measurement, and other physical and chemical properties of the electrodes have also been
investigated. Results showed activated carbon fiber-felt electrodes with high BET surface area
(>1500 m^2/g) containing mostly micropores (modal distribution at 1.2nm). In the latter,
electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic chargedischarge
(GCD) techniques were conducted to evaluate the electrochemical characteristics and
performance of electrodes. Experiments were carried out in a symmetric two-electrode
configuration cell (Swagelok-type) in aqueous and glycerol-based KOH electrolytes. Results showed
that the glycerol-based KOH electrolyte enhanced the specific capacitance (>120 F/g) and widened
the potential window (2.1 V) of the electrochemical supercapacitors (EDLC). The advantages and
disadvantages of aqueous and glycerol-based electrolytes will be discussed.
Como referenciar
BELINELI BARBOSA, I.A.; MARCUZZO, J.S.; FARIA, R.N. Influence of aqueous and glycerol-based electrolytes on the performance of activated carbon fiber-felt electrodes for supercapacitors. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33752. Acesso em: 06 Feb 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.