Protonated g-C3N4@polypyrrole derived N-doped porous carbon for supercapacitors and oxygen electrocatalysis. (November 2017)

• Record Type: Journal Article
• Authors: Li, Qi; Xu, Dan; Guo, Jiangna; Ou, Xu; Yan, Feng
• Is Part Of: Carbon. Volume 124(2017)
• Page Start: 599
• Page End: 610
• Publication Date: 2017-11
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.09.029
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Preparation of high-performance carbon materials with an abundance of heteroatoms, edges, and defects for sustainable energy-conversion technologies, such as supercapacitors and oxygen reaction reduction (ORR), are still a challenge. Herein, we reported a facile strategy for the large-scale synthesis of nitrogen-doped porous carbon via carbonization of core-shell structured protonated g-C3 N4 @polypyrrole (P- g -C3 N4 @PPy) nanocomposites. Polypyrrole provided both the carbon and heteroatom sources, while P-g-C3 N4 acted not only as a sacrificial template but also as nitrogen sources. Porous carbon derived from P-g-C3 N4 @PPy (denoted as PCN@PPy-C-900) exhibited a specific capacitance of 350 F g −1 at a current density of 5 A g −1 and a high-rate capability (320 F g −1 ) at 20 A g −1 in 6 M KOH aqueous solution, as well as good long-term stability after 1000 cycles. In addition, PCN@PPy-C-900 also displayed excellent electrocatalytic performances in ORR in 0.1 M KOH aqueous solution. The excellent electrochemical performances provide guidance for the structure design of this promising class of multifunctional carbon-based materials which can be large scale applied to supercapacitors, ORR, and other fields. Graphical abstract: