Artículos de revistas
Freestanding Aligned Multi-walled Carbon Nanotubes For Supercapacitor Devices
Registro en:
Journal Of Electronic Materials. Springer, v. 45, p. 5781 - 5788, 2016.
0361-5235
1543-186X
WOS:000385021300037
10.1007/s11664-016-4817-6
Autor
Silva Moreira
Joao Vitor; Corat
Evaldo Jose; May
Paul William; Ribeiro Cardoso
Lays Dias; Lelis
Pedro Almeida; Zanin
Hudson
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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. 45 11 5781 5788 Brazilian agency Fapesp [2014/02163-7, 2015/50093-0, 2014/21587-2, 2015/17829-3, 2015/17764-9] Royal Society [NI140181] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)