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- Title
Freestanding Aligned Multi-walled Carbon Nanotubes for Supercapacitor Devices.
- Authors
Moreira, João; Corat, Evaldo; May, Paul; Cardoso, Lays; Lelis, Pedro; Zanin, Hudson
- 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.
- Subjects
MULTIWALLED carbon nanotubes; SUPERCAPACITORS; TRANSMISSION electron microscopy; RAMAN spectroscopy; ELECTRODES; ENERGY storage; ELECTROSTATICS
- Publication
Journal of Electronic Materials, 2016, Vol 45, Issue 11, p5781
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-016-4817-6