Journal article
Polyaniline-coated freestanding porous carbon nanofibers as efficient hybrid electrodes for supercapacitors
Journal of power sources, v 293, pp 373-379
20 Oct 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Three-dimensional, free-standing, hybrid supercapacitor electrodes combining polyaniline (PAN!) and porous carbon nanofibers (P-CNFs) were fabricated with the aim to integrate the benefits of both electric double layer capacitors (high power, cyclability) and pseudocapacitors (high energy density). A systematic investigation of three different electropolymerization techniques, namely, potentiodynamic, potentiostatic, and galvanostatic, for electrodeposition of PANI on freestanding carbon nanofiber mats was conducted. It was found that the galvanostatic method, where the current density is kept constant and can be easily controlled facilitates conformal and uniform coating of PANI on three-dimensional carbon nanofiber substrates. The electrochemical tests indicated that the PANI-coated P-CNFs exhibit excellent specific capacitance of 366 F g(-1) (vs. 140 F g(-1) for uncoated porous carbon nanofibers), 140 F cm(-3) volumetric capacitance, and up to 23 F cm(-2) areal capacitance at 100 mV s(-1) scan rate. Such excellent performance is attributed to a thin and conformal coating of PANI achieved using the galvanostatic electrodeposition technique, which not only provides pseudocapacitance with high rate capability, but also retains the double-layer capacitance of the underlying P-CNFs. (C) 2015 Elsevier B.V. All rights reserved.
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Details
- Title
- Polyaniline-coated freestanding porous carbon nanofibers as efficient hybrid electrodes for supercapacitors
- Creators
- Chau Tran - Drexel UniversityRicha Singhal - Drexel UniversityDaniel Lawrence - Drexel UniversityVibha Kalra - Drexel University
- Publication Details
- Journal of power sources, v 293, pp 373-379
- Publisher
- Elsevier
- Number of pages
- 7
- Grant note
- CAREER CBET-1150528 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000358809700045
- Scopus ID
- 2-s2.0-84930204874
- Other Identifier
- 991019167417404721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary