Novel freestanding core-shell nanofibrillated cellulose/ polypyrrole/tubular graphitic carbon nitride composite film for supercapacitors electrodes

• Published in: Vacuum 2019-03, Vol.161, p.283-290
• Main Authors: Li, Fenglong, Dong, Yue, Dai, Qian, Nguyen, Tat Thang, Guo, Minghui
• Format: Article
• Language: English
• Subjects: Nanofibrillated cellulose; Polypyrrole; Supercapacitors electrodes; Tubular graphitic carbon nitride
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/j.vacuum.2018.12.046

Polypyrrole, a conductive polymer, has been recognized as a promising material for preparing advanced energy storage devices. And an energy storage material based on tubular graphitic carbon nitride is introduced to fabricate supercapacitors electrodes. In this study, freestanding core-shell NFC/PPy/TGCN composite film was successfully fabricated by simple polymerization followed by vacuum-induced self-assembly. The obtained electrodes delivered high areal capacitance of 2.53 F cm−2 at the current density of 5 mA cm−2, equivalent to a specific capacitance of 158 F g−1. The environmentally friendly aspects of the proposed method coupled with low-cost of fabrication and excellent electrochemical performances make it the future of energy storage devices. [Display omitted] •Tubular g-C3N4 as novel energy storage material has been successfully fabricated.•Freestanding core-shell NFC/PPy/TGCN composite film as supercapacitors electrodes exhibits good areal capacitance.•PPy was uniformly deposited on the NFC surface by introducing the PVP.