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Solution Processed TiO2 Nanotubular Core with Polypyrrole Conducting Polymer Shell Structures for Supercapacitor Energy Storage Devices

Published online by Cambridge University Press:  23 May 2013

Navjot K. Sidhu ,
Ratheesh R. Thankalekshmi  and
A.C. Rastogi
Navjot K. Sidhu
Affiliation:
Electrical and Computer Engineering Department, Binghamton University, State University of New York, Binghamton, NY13902, U.S.A. Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY13902, U.S.A.
Ratheesh R. Thankalekshmi
Affiliation:
Electrical and Computer Engineering Department, Binghamton University, State University of New York, Binghamton, NY13902, U.S.A. Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY13902, U.S.A.
A.C. Rastogi
Affiliation:
Electrical and Computer Engineering Department, Binghamton University, State University of New York, Binghamton, NY13902, U.S.A. Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY13902, U.S.A.
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Abstract

Ordered one dimensional polypyrrole conducting polymer structure as a shell over TiO2 nanotube arrays at the core were formed by pulsed current electropolymerization. TiO2 nanotubes with rippled wall structure are designed by action of water in the anodizing medium. This provides open tube structure supporting short diffusion length and increased accessibility of ions involved in redox transition for energy storage. Electrochemical properties evaluated by cyclic voltammetry and electrochemical impedance spectroscopy show specific capacitance of 34-44 mF.cm-2 and extremely low bulk and charge transfer resistances.

Keywords

core/shellelectrodepositionenergy storage

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References

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