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Synthesis and Electrochemical Properties of Polypyrrole Conducting Polymer in Sheath like Nanotube Arrays Structured over TiO2 for Supercapacitor Energy Storage Devices

Published online by Cambridge University Press:  10 February 2015

Navjot K. Sidhu  and
A.C. Rastogi
Navjot K. Sidhu
Affiliation:
Electrical and Computer Engineering Department, Binghamton University, State University of New York, Binghamton, NY 13902, U.S.A. Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY 13902, U.S.A.
A.C. Rastogi
Affiliation:
Electrical and Computer Engineering Department, Binghamton University, State University of New York, Binghamton, NY 13902, U.S.A. Center for Autonomous Solar Power (CASP), Binghamton University, State University of New York, Binghamton, NY 13902, U.S.A.
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Abstract

The vertical TiO2 nanotube arrays constituting the core of 3-D nanoscale electrode architecture were synthesized over Ti sheet by anodization. Such formed TiO2 nanotubes are electrically conducting and amorphous as confirmed by XRD studies. Nanotube morphology is affected by water content and in the present study, close-packed 3-4 μm long TiO2 nanotube arrays of 45-50 nm diameter are formed with 2% water as revealed by the transmission and scanning electron microscopy. The redox active polypyrrole sheath is created by ultra-short pulsed current electropolymerization. Electrochemical properties of the 3-D nanoscaled TiO2 nanotube core-polypyrrole sheath electrodes relevant to the energy storage were investigated using cyclic voltammetry (CV) plots, electrochemical impedance spectroscopy (EIS), Charge discharge (CD) tests. High areal capacitance density of 48 mF cm-2 and low charge transfer resistance 12 Ω cm-2 with least ion diffusion limitation are realized at optimized polypyrrole sheath thickness. The Raman spectra studies reveal anion at specific chain locations involve in the redox process.

Keywords

core/shellelectrodepositionenergy storage
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1749: Symposium JJ – 3D Mesoscale Architectures—Synthesis, Assembly, Properties and Applications , 2015 , mrsf14-1749-jj03-18
Copyright
Copyright © Materials Research Society 2015 

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References

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