Highly Stable Indacenodithieno[3,2-b]thiophene-Based Donor-Acceptor Copolymers for Hybrid Electrochromic and Energy Storage Applications
Journal article, 2020
Stable doping of indacenodithieno[3,2-b]thiophene (IDTT) structures enables easy color tuning and significant improvement in the charge storage capacity of electrochromic polymers, making use of their full potential as electrochromic supercapacitors and in other emerging hybrid applications. Here, the IDTT structure is copolymerized with four different donor-acceptor-donor (DAD) units, with subtle changes in their electron-donating and electron-withdrawing characters, so as to obtain four different donor-acceptor copolymers. The polymers attain important form factor requirements for electrochromic supercapacitors: desired switching between achromatic black and transparent states (L*a*b∗ 45.9, -3.1, -4.2/86.7, -2.2, and -2.7 for PIDTT-TBT), high optical contrast (72% for PIDTT-TBzT), and excellent electrochemical redox stability (Ired/Iox ca. 1.0 for PIDTT-EBE). Poly[indacenodithieno[3,2-b]thiophene-2,8-diyl-alt-4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2-(2-hexyldecyl)-2H-benzo[d][1,2,3]triazole-7,7′-diyl] (PIDTT-EBzE) stands out as delivering simultaneously a high contrast (69%) and doping level (>100%) and specific capacitance (260 F g-1). This work introduces IDTT-based polymers as bifunctional electro-optical materials for potential use in color-tailored, color-indicating, and self-regulating smart energy systems.
Author
Petri Henrik Murto
University of Cambridge
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Flinders University
S. Elmas
Flinders University
Ulises Mendez Romero
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Centro de Investigacion en Materiales Avanzados
Yanting Yin
Flinders University
Zewdneh Genene
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Mariza Mone
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Flinders University
G. Andersson
Flinders University
Mats Andersson
Flinders University
Ergang Wang
Zhengzhou University
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Macromolecules
00249297 (ISSN) 15205835 (eISSN)
Vol. 53 24 11106-11119Subject Categories
Inorganic Chemistry
Materials Chemistry
Condensed Matter Physics
DOI
10.1021/acs.macromol.0c02212