File:Nanomaterials-09-01590.pdf
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DescriptionNanomaterials-09-01590.pdf |
English: Vertically aligned carbon nanotube (VACNT) forests are promising for supercapacitor electrodes, but their industrialisation requires a large-scale cost-effective synthesis process suitable to commercial aluminium (Al) foils, namely by operating at a low temperature (<660 °C). We show that Aerosol-Assisted Catalytic Chemical Vapour Deposition (CCVD), a single-step roll-to-roll compatible process, can be optimised to meet this industrial requirement. With ferrocene as a catalyst precursor, acetylene as a carbon source and Ar/H2 as a carrier gas, clean and dense forests of VACNTs of about 10 nm in diameter are obtained at 615 °C with a growth rate up to 5 µm/min. Such novel potentiality of this one-step CCVD process is at the state-of-the-art of the multi-step assisted CCVD processes. To produce thick samples, long synthesis durations are required, but growth saturation occurs that is not associated with a diffusion phenomenon of iron in aluminium substrate. Sequential syntheses show that the saturation trend fits a model of catalytic nanoparticle deactivation that can be limited by decreasing acetylene flow, thus obtaining sample thickness up to 200 µm. Cyclic voltammetry measurements on binder-free VACNT/Al electrodes show that the CNT surface is fully accessible to the ionic liquid electrolyte, even in these dense VACNT forests. |
Date | |
Source |
https://www.mdpi.com/2079-4991/9/11/1590 https://doi.org/10.3390/nano9111590 |
Author | Fabien Nassoy, Mathieu Pinault, Jérémie Descarpentries, Thomas Vignal, Philippe Banet, Pierre-Eugène Coulon, Thomas Goislard de Monsabert, Harald Hauf, Pierre-Henri Aubert, Cécile Reynaud and Martine Mayne-L’Hermite |
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Short title | Single-Step Synthesis of Vertically Aligned Carbon Nanotube Forest on Aluminium Foils |
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Image title | Vertically aligned carbon nanotube (VACNT) forests are promising for supercapacitor electrodes, but their industrialisation requires a large-scale cost-effective synthesis process suitable to commercial aluminium (Al) foils, namely by operating at a low temperature (<660 C). We show that Aerosol-Assisted Catalytic Chemical Vapour Deposition (CCVD), a single-step roll-to-roll compatible process, can be optimised to meet this industrial requirement. With ferrocene as a catalyst precursor, acetylene as a carbon source and Ar/H2 as a carrier gas, clean and dense forests of VACNTs of about 10 nm in diameter are obtained at 615 C with a growth rate up to 5 m/min. Such novel potentiality of this one-step CCVD process is at the state-of-the-art of the multi-step assisted CCVD processes. To produce thick samples, long synthesis durations are required, but growth saturation occurs that is not associated with a diffusion phenomenon of iron in aluminium substrate. Sequential syntheses show that the saturation trend fits a model of catalytic nanoparticle deactivation that can be limited by decreasing acetylene flow, thus obtaining sample thickness up to 200 m. Cyclic voltammetry measurements on binder-free VACNT/Al electrodes show that the CNT surface is fully accessible to the ionic liquid electrolyte, even in these dense VACNT forests. |
Author | Fabien Nassoy, Mathieu Pinault, Jérémie Descarpentries, Thomas Vignal, Philippe Banet, Pierre-Eugène Coulon, Thomas Goislard de Monsabert, Harald Hauf, Pierre-Henri Aubert, Cécile Reynaud and Martine Mayne-L’Hermite |
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Software used | LaTeX with hyperref package |
Conversion program | pdfTeX-1.40.18 |
Encrypted | no |
Page size | 595.276 x 841.89 pts (A4) |
Version of PDF format | 1.5 |