Plasma synthesis of polyaniline enrobed carbon nanotubes for electrochemical applications
| Autor: | Eva Kovacevic, Johannes Berndt, Enric Bertran-Serra, Roger Amade, Shahzad Hussain, Cedric Pattyn, A. Dias, Mohamed-Ramzi Ammar, Chantal Boulmer-Leborgne |
|---|---|
| Přispěvatelé: | Groupe de recherches sur l'énergétique des milieux ionisés (GREMI), Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Centro de Investigacao em Materiais Ceramicaos e Compositos (CICECO), Universidade de Aveiro, Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering 02 engineering and technology Carbon nanotube Chemical vapor deposition 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound symbols.namesake X-ray photoelectron spectroscopy [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] law Polyaniline Electrochemistry Thin film ComputingMilieux_MISCELLANEOUS Supercapacitor 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | Electrochimica Acta Electrochimica Acta, Elsevier, 2018, 268, pp.218-225. ⟨10.1016/j.electacta.2018.02.112⟩ |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.02.112 |
| Popis: | Radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) was employed to synthesize vertically aligned carbon nanotubes (VACNTs) using Ni catalyst on TiN/SiO2/Si substrate. Subsequently, CNTs were covered by a thin film of polyaniline (PANI) applying RF-plasma polymerization method. The structure and chemical nature of the samples were identified by microscopic and spectroscopic techniques. Scanning electron microscopy (SEM) evidences the presence of a PANI thin film wrapping the surface of CNTs. X-ray photoelectron spectroscopy (XPS) reveals that PANI presents a polyemeraldine based structure. Raman spectroscopy results show the appearance of fluorescence caused by a thin film of PANI over the carbon nanotubes. VACNTs and PANI enrobed VACNTs were electrochemically tested for supercapacitor applications in 0.2 M Na2SO4 electrolyte solution. VACNTs and PANI/CNTs electrodes deliver specific capacitances of 12 F/g and 1225 F/g respectively, at a scan rate of 5 mV/s. Cycling stability results show that at 15 A/g current density, PANI/CNTs composite retains 65% of the initial specific capacitance (410 F/g) after 5800 cycles. |
| Databáze: | OpenAIRE |
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