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Title: Coating of vertically aligned carbon nanotubes by a novel manganese oxide atomic layer deposition process for binder-free hybrid capacitors
Author: Silva, Ricardo M.
Clavel, Guylhaine
Fan, Yafei
Amsalem, Patrick
Koch, Norbert
Silva, Rui F.
Pinna, Nicola
Issue Date: Nov-2016
Publisher: Wiley
Abstract: A novel atomic layer deposition process of manganese oxide from methylcyclopentadienyl manganese tricarbonyl and ozone has been developed. It is used to coat vertically aligned carbon nanotubes (VACNTs) grown on a conductive Inconel substrate in order to produce a 3D array of metal oxide-carbon nanotube electrode. Electron microscopy studies show that a conformal polycrystalline film can be deposited on the VACNTs arrays. X-ray diffraction, small area electron diffraction, and X-ray photoelectron spectroscopy analysis determine the formation of hausmannite (Mn3O4). The electrochemical properties of the as-prepared VACNTs/Mn3O4 nanocomposite electrodes are studied using cyclic voltammetry, galvanostatic charge and discharge cycling in 1 m Na2SO4 aqueous electrolyte. Capacitances as high as 78.62 mF cm−2 at 5 mV s−1 are demonstrated which is one order of magnitude higher than that of pristine VACNTs. In addition, the as-prepared VACNTs/Mn3O4 nanocomposite electrode showed a good reversibility and cycling stability.
Peer review: yes
DOI: 10.1002/admi.201600313
ISSN: 2196-7350
Appears in Collections:CICECO - Artigos

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