Atmospheric Pressure Plasma-Jet Treatment of PAN-Nonwovens—Carbonization of Nanofiber Electrodes

  • Carbon nanofibers are produced from dielectric polymer precursors such as polyacrylonitrile (PAN). Carbonized nanofiber nonwovens show high surface area and good electrical conductivity, rendering these fiber materials interesting for application as electrodes in batteries, fuel cells, and supercapacitors. However, thermal processing is slow and costly, which is why new processing techniques have been explored for carbon fiber tows. Alternatives for the conversion of PAN-precursors into carbon fiber nonwovens are scarce. Here, we utilize an atmospheric pressure plasma jet to conduct carbonization of stabilized PAN nanofiber nonwovens. We explore the influence of various processing parameters on the conductivity and degree of carbonization of the converted nanofiber material. The precursor fibers are converted by plasma-jet treatment to carbon fiber nonwovens within seconds, by which they develop a rough surface making subsequent surface activation processes obsolete. The resulting carbon nanofiber nonwovens are applied as supercapacitor electrodes and examined by cyclic voltammetry and impedance spectroscopy. Nonwovens that are carbonized within 60 s show capacitances of up to 5 F g⁻¹.

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Author:Andreas Hoffmann, Matthias UhlORCiD, Maximilian Ceblin, Felix Rohrbach, Joachim BansmannORCiD, Marcel Mallah, Holger HeuermannORCiD, Timo JacobORCiD, Alexander J.C. KuehneORCiD
DOI:https://doi.org/10.3390/c8030033
ISSN:2311-5629
Parent Title (English):C - Journal of Carbon Research
Publisher:MDPI
Place of publication:Basel
Document Type:Article
Language:English
Year of Completion:2022
Date of first Publication:2022/06/22
Date of the Publication (Server):2023/01/25
Volume:8
Issue:3
Length:8 Seiten
Note:
This article belongs to the Collection "Nanoporous Carbon Materials for Advanced Technological Applications"
Link:https://doi.org/10.3390/c8030033
Zugriffsart:weltweit
Institutes:FH Aachen / IMP - Institut für Mikrowellen- und Plasmatechnik
collections:Open Access
Verlag / MDPI
Licence (German):License LogoCreative Commons - Namensnennung