Influence of separator thickness on the performance of electric double layer supercapacitors in aqueous electrolyte
Carregando...
Data
2020
Data de publicação:
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Materials Science Forum
Exportar
Resumo
The effects of the separator thickness (δ) upon the equivalent series resistances (ESR)
and specific capacitances (Cs) of supercapacitors electrodes have been investigated using
commercially available porous filter paper (δ=150 μm, pores size=7.5 μm, 80 gm-2). Commercial
activated carbon electrodes immersed in 1molL-1 KOH electrolyte (25°C) 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 (δ=4200 μm) have been employed in this investigation.
It has been shown that the ESR increases substantially with separator thickness (from 3.1 to
7.9 Ωcm2). 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.C.S.; FARIA, R.N. Influence of separator thickness on the performance of electric double layer supercapacitors in aqueous electrolyte. Materials Science Forum, v. 1012, p. 109-113, 2020. DOI: 10.4028/www.scientific.net/MSF.1012.109. Disponível em: http://200.136.52.105/handle/123456789/31635. Acesso em: 29 Mar 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.