Solid-State Supercapacitor Constructed with Organic Electrochromic Electrodes Based on Dithienothiophene and 3,4-Ethylenedioxythiophene

Sebahat Topal, Ilknur Demirtas, Erdal Ertas, Belkis Ustamehmetoglu, Esma Sezer*, Turan Ozturk*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Capacitive and electrochromic behaviors of electrodeposited poly{4,4′-[2,6-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl) dithieno[3,2-b:2′,3′-d]thiophene-3,5-diyl] dibenzonitrile}, P[E-CNDTT-E], are reported. The morphological, structural, and electrochemical properties of the polymer are determined by atomic force microscopy, Fourier transform infrared, cyclic voltammetry, spectroelectrochemical measurements, electrochemical impedance spectroscopy, and galvanostatic charging/discharging measurements. Theoretical calculations support the planarity of the structure through O···S interactions, which allow the polymer to have a low band gap of 1.43 eV. P[E-CNDTT-E] has a high capacitance of 223 F g-1 at the current density of 1 A g-1 and displays a color change from purple to gray with an optical contrast of 30% and a coloration efficiency of 450 cm2 C-1 upon applying cathodic potential. The solid-state supercapacitor is constructed, which has a high specific capacitance of 63 F g-1 and a significant energy density of 6.5 W h kg-1. Additionally, the device retains 90% of its capacitance after 8000 cycles.

Original languageEnglish
Pages (from-to)11532-11540
Number of pages9
JournalACS Applied Energy Materials
Volume6
Issue number22
DOIs
Publication statusPublished - 27 Nov 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society

Funding

We thank the Istanbul Technical University Scientific Research Projects Department (project number: 42325) for their support. We are indebted to the National Center for High Performance Computing (UHeM) (under grant number ) for the computational chemistry studies. We thank the Istanbul Technical University Scientific Research Projects Department (project number: 42325) for their support. We are indebted to the National Center for High Performance Computing (UHeM) (under grant number <4007702020>) for the computational chemistry studies.

FundersFunder number
Istanbul Technical University Scientific Research Projects Department42325
Ulusal Yüksek Başarımlı Hesaplama Merkezi, Istanbul Teknik Üniversitesi<4007702020
Sheikh Bahaei National High Performance Computing Center, Isfahan University of Technology

    Keywords

    • dithienothiophene
    • EDOT
    • electrochromic
    • energy storage
    • supercapacitor

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