Abstract
Graphene-embedded porous and smaller fibrous carbon nanofibers (CNFs) were prepared by a simple electrospinning method with the help of zinc chloride (ZnCl2), and their electrochemical properties as supercapacitor electrodes were investigated. The CNFs were characterized as having a large specific surface area of up to 520 m2g-1, mesopore volume fraction up to 35%, and high electrical conductivity (over 0.45 Scm-1) and exhibited a gravimetric capacitance of 148 Fg-1 and energy densities of 9.2-20.0 Whkg-1 over a power density range of 400-30,000 Wkg-1 in 6 M potassium hydroxide electrolyte. The introduction of ZnCl2 and graphene into the polyacrylonitrile (PAN) solution induced suitable micropores to accommodate many ions for high capacitance and mesopores for smooth ion transfer. Therefore, the cooperation of micro- and mesopores in the CNF electrode materials synergistically improves the performance of electrochemical double-layer capacitors (EDLCs) because these materials have a high rate capability, high capacitance, and long cycling life.
Keywords: Graphene, Zinc chloride, Electrospinning, Porous carbon nanofiber, Electrochemical behavior.
Current Organic Chemistry
Title:Electrochemical Behavior of Porous Carbon Nanofibers Developed from Polyacrylonitrile/ Graphene Solutions Containing Zinc Chloride
Volume: 17 Issue: 13
Author(s): So Yeun Kim, Bo-Hye Kim and Kap Seung Yang
Affiliation:
Keywords: Graphene, Zinc chloride, Electrospinning, Porous carbon nanofiber, Electrochemical behavior.
Abstract: Graphene-embedded porous and smaller fibrous carbon nanofibers (CNFs) were prepared by a simple electrospinning method with the help of zinc chloride (ZnCl2), and their electrochemical properties as supercapacitor electrodes were investigated. The CNFs were characterized as having a large specific surface area of up to 520 m2g-1, mesopore volume fraction up to 35%, and high electrical conductivity (over 0.45 Scm-1) and exhibited a gravimetric capacitance of 148 Fg-1 and energy densities of 9.2-20.0 Whkg-1 over a power density range of 400-30,000 Wkg-1 in 6 M potassium hydroxide electrolyte. The introduction of ZnCl2 and graphene into the polyacrylonitrile (PAN) solution induced suitable micropores to accommodate many ions for high capacitance and mesopores for smooth ion transfer. Therefore, the cooperation of micro- and mesopores in the CNF electrode materials synergistically improves the performance of electrochemical double-layer capacitors (EDLCs) because these materials have a high rate capability, high capacitance, and long cycling life.
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Kim Yeun So, Kim Bo-Hye and Yang Seung Kap, Electrochemical Behavior of Porous Carbon Nanofibers Developed from Polyacrylonitrile/ Graphene Solutions Containing Zinc Chloride, Current Organic Chemistry 2013; 17 (13) . https://dx.doi.org/10.2174/1385272811317130012
DOI https://dx.doi.org/10.2174/1385272811317130012 |
Print ISSN 1385-2728 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5348 |
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