Fabrication of aqueous solid-state symmetric supercapacitors based on self-healable poly (acrylamide)/PEDOT:PSS composite hydrogel electrolytes

Hina, Maryam and Bashir, Shahid and Kamran, Kashif and Iqbal, Javed and Ramesh, T. Subramaniam and Ramesh, Kasi (2021) Fabrication of aqueous solid-state symmetric supercapacitors based on self-healable poly (acrylamide)/PEDOT:PSS composite hydrogel electrolytes. Materials Chemistry and Physics, 273. ISSN 0254-0584, DOI https://doi.org/10.1016/j.matchemphys.2021.125125.

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The composite hydrogel electrolytes developed from conducting polymers own superb/excellent conductive, self-healing, and mechanical properties. However, it is still challenging to exploit them in energy storage devices. To address this issue, novel poly(acrylamide)/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) composite hydrogel electrolytes were developed through free radical polymerization in which sodium montmorillonite clay was added as a physical crosslinker. The different amounts of PEDOT:PSS were added to the composite hydrogel electrolytes. The structure of the synthesized composite hydrogel electrolytes was investigated by X-ray diffraction (XRD) analysis. The surface morphology of the composite hydrogel electrolyte was examined with the field emission scanning electron microscopy (FESEM) and elemental composition was determined using energy-dispersive X-ray spectroscopy (EDX). The ionic conductivity was measured at ambient temperature. Among the synthesized electrolytes, PEDOTAAM34 achieved the highest ionic conductivity of 13.7 x 10(-3) S/cm at room temperature. Furthermore, electrochemical studies were performed by sandwiching the composite hydrogel electrolytes between symmetric carbon-coated graphite electrodes. The fabricated AC/PEDOTAAM34/AC based symmetric supercapacitor attained the highest specific capacitance of 327 F/g at 3 mV/s and 385.4 F/g (energy density of 53.57 Wh/kg at a power density of 100.08 W/kg) at 100 mA/g current density. The self-healable characteristics of symmetric supercapacitors were confirmed by powering up a light-emitting diode (LED).

Item Type: Article
Funders: Fundamental Research Grant Scheme (FRGS) from Ministry of Education, Malaysia (FP062-2018A), Collaborative Research in Engineering, Science & Technology Center (CREST) (PV027-2018), Bahauddin Zakariya University, Multan, Pakistan
Uncontrolled Keywords: Poly (acrylamide)/PEDOT:PSS; Composite hydrogel electrolytes; Free radical; Flexible; Electrochemical performance
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 12 Apr 2022 07:41
Last Modified: 12 Apr 2022 07:41
URI: http://eprints.um.edu.my/id/eprint/28274

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