Rylene diimide-based alternate and random copolymers for flexible supercapacitor electrode materials with exceptional stability and high power density
| Title | Rylene diimide-based alternate and random copolymers for flexible supercapacitor electrode materials with exceptional stability and high power density |
| Publication Type | Journal Article |
| Year of Publication | 2019 |
| Authors | Sharma, S, Soni, R, Kurungot, S, Asha, SK |
| Journal | Journal of Physical Chemistry C |
| Volume | 123 |
| Issue | 4 |
| Pagination | 2084–2093 |
| Date Published | JAN |
| Type of Article | Article |
| Abstract | Donor–acceptor pi-conjugated polymers are emerging as interesting electrode materials for supercapacitor device applications. They offer an exciting possibility of charge storage in both positive and negative electrodes because they are both p- and n-dopable. The ambipolar charging enables higher operating voltage, which can afford higher specific energy and power densities. The donor–acceptor design can be either donor-alternate-acceptor or donor-random-acceptor. This architectural variation has the potential to modify the charge storage; yet surprisingly not much literature data is available exploiting this aspect. This paper explores the alternate and random geometries of donor–acceptor π-conjugated polymers based on naphthalene diimide or perylene diimide (PDI) as the acceptor component and benzodithiophene (BDT) as the donor component and their application as composite electrode materials in a type III supercapacitor device. Results show that the donor–acceptor alternate design involving P(PDI-alt-BDT) is an excellent supercapacitor electrode material with specific capacitance of 113 F g–1 with excellent stability up to 4000 cycles and almost 100% retention of the initial capacitance in a single-electrode setup in a PC-LiClO4 organic electrolyte. A flexible supercapacitor device was also fabricated which shows areal capacitance of 35 mF cm–2 at a current density of 0.5 mA cm–2, which is promising for commercial applications. |
| DOI | 10.1021/acs.jpcc.8b11229 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 4.484 |
Divison category:
Physical and Materials Chemistry
Polymer Science & Engineering
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