Non-conjugated electrochromic supercapacitors with atom-economic arylamine-based AB2-polyamides
Journal
Journal of Materials Chemistry A
Journal Volume
12
Journal Issue
31
Start Page
20327
End Page
20336
ISSN
2050-7488
2050-7496
Date Issued
2024-07-01
Author(s)
DOI
10.1039/d4ta03178d
Abstract
A highly atom-economic AB2-type hyperbranched polyamide (HPA) derived from arylamine monomers was judiciously designed and prepared. This electroactive HPA was further end-capped with two different end-cappers to prepare HPA-B and HPA-TPA with intrinsic microporous structures, which exhibited improved counter-ion diffusivity in electrochemical processes. With the aid of the intrinsic microporous structure, HPA-TPA revealed outstanding characteristics such as three-stage color changes, the highest coloration efficiency (CE), and the shortest switching response times among the prepared redox-active polyamides. Electrochromic devices employing ECD-HPA-TPA in this study demonstrated remarkable performance, evidenced by their rapid coloration rate of 27.4% s−1 and impressive switching stability. While evaluating and comparing the capacitive behavior of the HPA-TPA film, it showed 73.2 F g−1 at 1.0 A g−1 with nearly 60% transmittance contrast with only 220 nm thickness, and stability with 90.2% retention in a 300-cycle charge-discharge process. Furthermore, we compared its stability with polyamides derived from triphenylamine-based diamines to elucidate the effect on the reversibility during the charge-discharge process.
SDGs
Publisher
Royal Society of Chemistry (RSC)
Type
journal article