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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.|
Silva, Rui F.
|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.|
|Appears in Collections:||CICECO - Artigos|
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|Coating of Vertically Aligned Carbon Nanotubes by a Novel Manganese Oxide Atomic Layer Deposition Process for Binder-Free Hybrid Capacitors_10.1002admi.201600313.pdf||1.84 MB||Adobe PDF|
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