Influence o separator thickness on the performance of electric double layer supercapacitors in aqueous electrolyte
Carregando...
Data
Data de publicação:
2018
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.
Exportar
Resumo
The effects of the separator thickness (?) upon the equivalent series and resistances
(ESR) and specific capacitances (Cs) of supercapacitors electrodes have been
investigated using commercially available porous filter paper (?=150 ?m, pores
size=7.5 ?m, 80 gm-2). Commercial activated carbon electrodes immersed in 1molL-
1 KOH electrolyte (25oC) have been employed in this study. The specific capacitances
were calculated from cyclic voltammetry curves at room temperature employing
various scan rates (5, 10, 15 and 30 mVs-1). Internal series resistances of the
supercapacitors were measured using the galvanostatic charge discharge curves also
at room temperature. A maximum of 28 separators (?=4200 ?m) have been employed
in this investigation. It has been shown that the ESR increases substantially with
separator thickness (from 3.1 to 7.9 ?cm2). The specific capacitance decreased
somewhat with increasing separator thickness and scan rates (from 64 to 52 Fg-1; at
5 mVs-1). The microstructures of the electrode material have been investigated using
scanning electron microscopy (SEM) and chemical microanalyses employing energy
dispersive X-ray analysis (EDX). A compositional and morphological evaluation of
these electrodes showed a very homogeneous microstructure.
Como referenciar
SILVA, D.V.; GALDINO, G.S.; BARBOSA, L.P.; CASINI, J.S.; FARIA, R.N. Influence o separator thickness on the performance of electric double layer supercapacitors in aqueous electrolyte. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23., 04-08 de novembro, 2018, Foz do Iguaçu, PR. Resumo... p. 664-664. Disponível em: http://repositorio.ipen.br/handle/123456789/29650. Acesso em: 19 Apr 2024.
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.