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Materials (Basel). 2017 Dec 28;11(1). pii: E48. doi: 10.3390/ma11010048.

Electrochemical Impedance Analysis of a PEDOT:PSS-Based Textile Energy Storage Device.

Author information

1
Department of Materials, Textiles, and Chemical Engineering, Centre for Textile Science and Engineering, Ghent University, B-9000 Gent, Belgium. Ida.Nuramdhani@UGent.be.
2
Department of Textile Chemistry, Polytechnic STTT Bandung, Bandung, Jawa Barat 40272, Indonesia. Ida.Nuramdhani@UGent.be.
3
Science and Letters Faculty, Chemistry Department, Istanbul Technical University, Maslak, 34469 Istanbul, Turkey. gokceorena@itu.edu.tr.
4
Department of Manufacturing, Industrial & Textile Engineering, Moi University, Eldoret, 30100-Rift Valley, Kenya. sheillatienoodhiambo@gmail.com.
5
Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, B-9000 Gent, Belgium. gilbert.demey@ugent.be.
6
Department of Materials, Textiles, and Chemical Engineering, Centre for Textile Science and Engineering, Ghent University, B-9000 Gent, Belgium. carla.hertleer@gmail.com.
7
Department of Materials, Textiles, and Chemical Engineering, Centre for Textile Science and Engineering, Ghent University, B-9000 Gent, Belgium. Lieva.VanLangenhove@UGent.be.

Abstract

A textile-based energy storage device with electroactive PEDOT:PSS (poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate)) polymer functioning as a solid-state polyelectrolyte has been developed. The device was fabricated on textile fabric with two plies of stainless-steel electroconductive yarn as the electrodes. In this study, cyclic voltammetry and electrochemical impedance analysis were used to investigate ionic and electronic activities in the bulk of PEDOT:PSS and at its interfaces with stainless steel yarn electrodes. The complex behavior of ionic and electronic origins was observed in the interfacial region between the conductive polymer and the electrodes. The migration and diffusion of the ions involved were confirmed by the presence of the Warburg element with a phase shift of 45° (n = 0.5). Two different equivalent circuit models were found by simulating the model with the experimental results: (QR)(QR)(QR) for uncharged and (QR)(QR)(Q(RW)) for charged samples. The analyses also showed that the further the distance between electrodes, the lower the capacitance of the cell. The distribution of polymer on the cell surface also played important role to change the capacitance of the device. The results of this work may lead to a better understanding of the mechanism and how to improve the performance of the device.

KEYWORDS:

PEDOT:PSS; electrochemical impedance spectroscopy; energy storage; textile device

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