Effect of cyano substitution on triphenylamine-based conjugated polymers coupled with V2O5 nanowires for asymmetric electrochromic supercapacitors
JOURNAL OF POWER SOURCES, cilt.699, 2027 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 699
- Basım Tarihi: 2027
- Doi Numarası: 10.1016/j.jpowsour.2026.241788
- Dergi Adı: JOURNAL OF POWER SOURCES
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
Asymmetric supercapacitors have attracted significant attention due to their ability to operate at extended voltage windows. This advantage arises from the use of two different electrode materials, which provides an effective strategy to overcome energy density limitation. Owing to their excellent optoelectronic properties, triphenylamine (TPA) and its derivatives have been widely used in electrochromic supercapacitors. In this study, two D-it-A-it-D type TPA derivative monomers were synthesized using the Stille cross-coupling reaction. In the monomer architecture, 3,4-Ethylenedioxythiophene (EDOT) was used as a donor moiety, thieno[3,2-b]thiophene (TT) was employed as a it-bridge, and TPA was used as the central electroactive core. The main difference between the synthesized monomers is the cyano (-CN) group and the-H group in the para position of the triphenylamine unit. Polymer films were fabricated on ITO/glass through an electropolymerization of monomers. The resulting polymer films exhibited pronounced multicolor electrochromism (ranging from red to brown, green, and blue) along with promising capacitive energy storage performance (31.98 mF/cm2 and 16.28 mF/cm2 for P-TPA-TT-CN and P-TPA-TT, respectively). When coupled with vanadium pentoxide nanowires (V2O5 NWs), the CN-functionalized conjugated polymer device delivers a wide operating voltage window of 1.5 V and a high coloration efficiency of 403 cm2/C.