3 years ago

One-step synthesis of PEDOT-PSS●TiO 2 by peroxotitanium acid: a highly stable electrode for a supercapacitor

K. Basavaiah, S. Palaniappan, G. Ramesh

Abstract

Pseudo capacitors can reserve high energy and power densities with a high efficiency, and a long life period. In this work, a hybrid material of poly (3,4-ethylenedioxythiophene) (PEDOT)-poly(4-styrene sulfonic acid) (PSS)-titanium dioxide (TiO2) was synthesized by the facile one-pot method by novel and low-cost oxidant peroxotitanium acid (PTiA) for the first time. PTiA acts as both oxidant and source for TiO2. XRD, EDAX, and XPS analysis supported the formation of the hybrid material. The hybrid material showed bundles of nanofibers morphology and stable up to 315 °C. This hybrid material was explored as a stable electrode material in symmetric supercapacitor cell configuration. This device showed a specific capacitance (SC) of 162 F g−1 at a current density of 0.25 A g−1. Subjected the call for 38,000 charge–discharge (CD) cycles at a higher current density of 1.25 A g−1 and it showed 52% retention of initial capacitance (125 F g−1).

Graphical abstract

Publisher URL: https://link.springer.com/article/10.1007/s11581-017-2289-1

DOI: 10.1007/s11581-017-2289-1

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