Convergent covalent organic framework thin sheets as flexible supercapacitor electrodes
| Title | Convergent covalent organic framework thin sheets as flexible supercapacitor electrodes |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Khayum, AM, Vijayakumar, V, Karak, S, Kandambeth, S, Bhadra, M, Suresh, K, Acharambath, N, Kurungot, S, Banerjee, R |
| Journal | ACS Applied Material & Interfaces |
| Volume | 10 |
| Issue | 33 |
| Pagination | 28139-28146 |
| Date Published | AUG |
| Type of Article | Article |
| Abstract | Flexible supercapacitors in modern electronic equipment require light-weight electrodes, which have a high surface area, precisely integrated redox moieties, and mechanically strong flexible free-standing nature. However, the incorporation of the aforementioned properties into a single electrode remains a great task. Herein, we could overcome these challenges by a facile and scalable synthesis of the convergent covalent organic framework (COF) free-standing flexible thin sheets through solid-state molecular baking strategy. Here, redox-active anthraquinone (Dq) and pi-electron-rich anthracene (Da) are judiciously selected as two different linkers in a beta-ketoenamine-linked two-dimensional (2D) COF. As a result of precisely integrated anthraquinone moieties, COF thin sheet exhibits redox activity. Meanwhile, pi-electron-rich anthracene linker assists to improve the mechanical property of the free-standing thin sheet through the enhancement of noncovalent interaction between crystallites. This binder-free strategy offers the togetherness of crystallinity and flexibility in 2D COF thin sheets. Also, the synthesized porous crystalline convergent COF thin sheets are benefited with crack-free uniform surface and light-weight nature. Further, to demonstrate the practical utility of the material as an electrode in energy-storage systems, we fabricated a solid-state symmetrical flexible COF supercapacitor device using a GRAFOIL peeled carbon tape as the current collector. |
| DOI | 10.1021/acsami.8b10486 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 8.097 |
Divison category:
Physical and Materials Chemistry