High Surface Area Carbon Nanofibers Derived from Electrospun Pim-1 for Energy Storage Applications

DSpace/Manakin Repository

High Surface Area Carbon Nanofibers Derived from Electrospun Pim-1 for Energy Storage Applications

Show full item record

Title: High Surface Area Carbon Nanofibers Derived from Electrospun Pim-1 for Energy Storage Applications
Author(s):
Bonso, Jeliza S. (UT Dallas);
Kalaw, Grace Jones D. (UT Dallas);
Ferraris, John P. (UT Dallas)
Format: Text
Item Type: Article
Keywords: Carbon fibers
Polymers
Electrospinning
Abstract: Electrochemical double layer capacitors (EDLCs) utilize electrodes with high surface area to achieve high-energy storage capability. In this study, flexible and freestanding carbon nanofibers derived from PIM-1, a microporous polymer with high free volume, were prepared by pyrolysis of the electrospun polymer. A BET surface area of 546 m² g⁻¹ was obtained upon carbonization of the electrospun PIM-1 fibers. After further heat treatments such as steam-activation and annealing, the surface area increased to 1162 m² g⁻¹. These carbon fibers were directly used as electrodes without the use of binders in a coin cell (CR2032) configuration and were characterized by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The activated and annealed fibers gave a specific capacitance of 120 F g⁻¹ at a scan rate of 10 mV s⁻¹ using 1,3-ethylmethylimidizaolium bis(trifluoromethanesulfonyl) imide as the ionic liquid electrolyte. From the galvanostatic charge-discharge test, the supercapacitor exhibited energy and power densities of 60 W h kg ⁻¹ (active material) and 1.7 kW kg⁻¹, respectively, at a current density of 1 A g⁻¹. High power application of this device was demonstrated by its 77% retention of the energy density (47 W h kg⁻¹) at a higher discharge current density of 5 A g⁻¹.
ISSN: 2050-7488
Persistent Link: http://hdl.handle.net/10735.1/3631
http://dx.doi.org/10.1039/c3ta13779a
Terms of Use: ©2014 The Royal Society of Chemistry

Files in this item

Files Size Format View
NSM-FR-JPFerraris-309478.53.pdf 771.1Kb PDF View/Open

This item appears in the following Collection(s)


Show full item record