NDLI: 1-Dimensional confinement of porous polyethylenedioxythiophene using carbon nanofibers as a solid template: an efficient charge storage material with improved capacitance retention and cycle stability

Content Provider	Royal Society of Chemistry (RSC)
Author	Kurungot, Sreekumar Anothumakkool, Bihag Bhange, Siddheshwar N. Unni, Sreekuttan M.
Copyright Year	2013
Abstract	Here, we report a highly conducting porous 1-dimensionally (1-D) confined nano hybrid of polyethylenedioxythiophene (PEDOT) using a cup-stacked hollow carbon nanofiber (CNF) as a solid template for potential charge storage applications. The unique features of the nano confinement involve significantly high porosity and conductivity with the establishment of the 1-D architecture. Since the tubular morphology of the CNF with its open tips provides facile routes for the electrolyte, the overall utilization of the active surface and conductivity increases the charge storage properties of PEDOT in the hybrid. The approach helped in achieving a high specific capacitance of 177 F g−1 for 40% PEDOT-CNF at a scan rate of 50 mV s−1 and in retaining 130 F g−1 even at 3000 mV s−1 compared to 76 and 30 F g−1 respectively given by pure PEDOT in 0.5 M H2SO4. The hybrid CP-40 shows a very high power density of 51 kW kg−1 with an energy density of 4.7 Wh kg−1. High capacitance retention is supported by the low charge transfer resistance and very low time constant (less than 0.5 s) values for the hybrid using impedance analysis. Phase angle calculations from a Bode plot also show an ideal capacitive nature with −90° phase difference at 0.1 Hz for the hybrids. Apart from all these, the solid CNF backbone helps the hybrid material to display excellent cycle stability with >98% retention in capacitance over 4500 charge–discharge cycles compared to pristine PEDOT at a current density of 2 A g−1.
Starting Page	11877
Ending Page	11887
Page Count	11
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	3
Issue Number	29
Journal	RSC Advances
DOI	10.1039/c3ra40853a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Poly(3,4-ethylenedioxythiophene) Energy density Carbon nanofiber IBM CP-40 PEDOT Phase angle Electrolyte Bode plot Capacitance CNF Porosity Electric current Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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