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Type: Artigo
Title: Freestanding Aligned Multi-walled Carbon Nanotubes For Supercapacitor Devices
Author: Silva Moreira
Joao Vitor; Corat
Evaldo Jose; May
Paul William; Ribeiro Cardoso
Lays Dias; Lelis
Pedro Almeida; Zanin
Abstract: We report on the synthesis and electrochemical properties of multi-walled carbon nanotubes (MWCNTs) for supercapacitor devices. Freestanding vertically-aligned MWCNTs and MWCNT powder were grown concomitantly in a one-step chemical vapour deposition process. Samples were characterized by scanning and transmission electron microscopies and Fourier transform infrared and Raman spectroscopies. At similar film thicknesses and surface areas, the freestanding MWCNT electrodes showed higher electrochemical capacitance and gravimetric specific energy and power than the randomly-packed nanoparticle-based electrodes. This suggests that more ordered electrode film architectures facilitate faster electron and ion transport during the charge-discharge processes. Energy storage and supply or supercapacitor devices made from these materials could bridge the gap between rechargeable batteries and conventional high-power electrostatic capacitors.
Subject: Carbon
Electrochemical Cell
Editor: Springer
New York
Citation: Journal Of Electronic Materials. Springer, v. 45, p. 5781 - 5788, 2016.
Rights: fechado
Identifier DOI: 10.1007/s11664-016-4817-6
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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