Radial growth kinetics of epitaxial pyrolytic carbon layers deposited on carbon nanotube surfaces by non-catalytic pyrolysis

Liu, Fan; Nishioka, Naoto; Ogawa, Fumio; Hashida, Toshiyuki

doi:10.1016/j.diamond.2022.108857

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…Radial templating eventually resulted in the concentric crystallization of the graphitic structure. [32,33] With further carbonization at 2500 °C, the stiffness of the SWNT molecules surrounded by a concentrically templated structure increased, thereby inhibiting the coalescence into the graphitized PAN film matrix (Figure 3c). Hence, SWNTs and templated structures remained at 2500 °C.…”

Section: Templating and Coalescing Behaviors Of Swnts In Carbon Filmsmentioning

confidence: 99%

Achieving Both Ultrahigh Electrical Conductivity and Mechanical Modulus of Carbon Films: Templating‐Coalescing Behavior of Single‐Walled Carbon Nanotube in Polyacrylonitrile

et al. 2023

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Promoting the feasibility of carbon films as electrode applications requires sufficient performances in view of both electrical and mechanical properties. Herein, carbon films with ultrahigh electrical conductivity and mechanical modulus are prepared by high temperature carbonization of polyacrylonitrile (PAN)/single-walled carbon nanotube (SWNT) nanocomposites. Achieving both performances is ascribed to remarkable graphitic crystallinity, resulting from the sequential templating-coalescing behavior of concentrated SWNT bundles (B-CNTs). While well-dispersed SWNTs (WD-CNTs) facilitate radial templating according to their tubular geometry, flattened B-CNTs sandwiched between carbonized PAN matrices induce vertical templating, where the former and latter produce concentric and planar crystallizations of the graphitic structure, respectively. After carbonization at 2500 °C with the remaining WD-CNTs as microstructural defects, the flattened B-CNTs coalesce into graphitic crystals by zipping the surrounding matrix, resulting in high crystallinity with the crystal thicknesses of 27.4 and 39.4 nm for the (002) and (10) planes, respectively. For comparison, the graphene oxide (GO) containing carbon films produce a less-ordered graphitic phase owing to irregular templating, despite the geometrical consistency. Consequently, PAN/B-CNT carbon films exhibit exceptional electrical conductivity (40.7 × 10 4 S m −1 ) and mechanical modulus (38.2 ± 6.4 GPa). Thus, controlling the templating−coalescing behavior of SWNTs is the key for improving final performances of carbon films.

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Section: Templating and Coalescing Behaviors Of Swnts In Carbon Filmsmentioning

confidence: 99%

Achieving Both Ultrahigh Electrical Conductivity and Mechanical Modulus of Carbon Films: Templating‐Coalescing Behavior of Single‐Walled Carbon Nanotube in Polyacrylonitrile

et al. 2023

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A transient coking model of hydrocarbon pyrolysis in hot pipe based on RPM analogy

Wang

et al. 2023

Chemical Engineering Science

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Impact of biogenic impurities on catalytic synthesis of multi-walled carbon nanotubes and hydrogen from polyolefin resins

Veksha,

Lu,

Tsakadze

et al. 2024

Journal of Cleaner Production

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Radial growth kinetics of epitaxial pyrolytic carbon layers deposited on carbon nanotube surfaces by non-catalytic pyrolysis

Cited by 3 publications

References 44 publications

Achieving Both Ultrahigh Electrical Conductivity and Mechanical Modulus of Carbon Films: Templating‐Coalescing Behavior of Single‐Walled Carbon Nanotube in Polyacrylonitrile

Achieving Both Ultrahigh Electrical Conductivity and Mechanical Modulus of Carbon Films: Templating‐Coalescing Behavior of Single‐Walled Carbon Nanotube in Polyacrylonitrile

A transient coking model of hydrocarbon pyrolysis in hot pipe based on RPM analogy

Impact of biogenic impurities on catalytic synthesis of multi-walled carbon nanotubes and hydrogen from polyolefin resins

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