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 language | English |
|---|---|
| Pages (from-to) | 11532-11540 |
| Number of pages | 9 |
| Journal | ACS Applied Energy Materials |
| Volume | 6 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 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.
| Funders | Funder number |
|---|---|
| Istanbul Technical University Scientific Research Projects Department | 42325 |
| 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