Coating of Vertically Aligned Carbon Nanotubes by a Novel Manganese Oxide Atomic Layer Deposition Process for Binder-Free Hybrid Capacitors
authors Silva, RM; Clavel, G; Fan, YF; Amsalem, P; Koch, N; Silva, RF; Pinna, N
nationality International
journal ADVANCED MATERIALS INTERFACES
keywords CHEMICAL-VAPOR-DEPOSITION; THIN-FILMS; SUPERCAPACITOR ELECTRODES; OZONE DECOMPOSITION; RAMAN-SPECTROSCOPY; OXYGEN EVOLUTION; BATTERIES; OXIDATION; SURFACES; CATALYST
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 nano-composite 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.
publisher WILEY-BLACKWELL
issn 2196-7350
year published 2016
volume 3
issue 21
digital object identifier (doi) 10.1002/admi.201600313
web of science category Chemistry, Multidisciplinary; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000393772400002
  ciceco authors
  impact metrics
times cited (wos core): 1
journal impact factor (jcr 2016): 4.279
5 year journal impact factor (jcr 2016): 4.302
category normalized journal impact factor percentile (jcr 2016): 81.455
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