Carbon nitride template-directed fabrication of nitrogen-rich porous graphene-like carbon for high performance supercapacitors. (April 2018)

• Record Type: Journal Article
• Authors: Yang, Wang; Hou, Liqiang; Xu, Xiuwen; Li, Zihui; Ma, Xinlong; Yang, Fan; Li, Yongfeng
• Is Part Of: Carbon. Volume 130(2018)
• Page Start: 325
• Page End: 332
• Publication Date: 2018-04
• Subjects: Carbon nitride -- Nitrogen-rich -- Graphene-like porous carbon -- Electrodes -- Supercapacitors; Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2018.01.032
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Facile yet rationally designed strategy for advanced electrode material synthesis is pivotal for energy storage. Herein, we report an protocol for g-C3 N4 template-directed in-situ fabricating nitrogen-rich porous graphene-like carbon sheets (NPGCs) by using plasma-enhanced chemical vapor deposition followed with high-temperature pyrolysis process, which totally avoids the postsynthetic template-removal. The resultant NPGCs integrate a range of intriguing features including highly conductive interconnected structure (693 S m −1 ), abundant mesoporous with ultrahigh pore volume (4.35 cm 3 g −1 ), large specific surface area (1277 m 2 g −1 ), high N doping (8.75 wt%), and good wettability. As supercapacitor electrode, the NPGCs exhibit a quite encouraging specific capacitance of 261 F g −1 at 1 A g −1, excellent rate capability (189 F g −1 even at 100 A g −1 ), and outstanding cycle performance (97% capacitance retention at 10 A g −1 after 20000 cycles), which outperforms most carbon-based materials reported to date. Moreover, the assembled supercapacitors deliver a high power density of 28.4 kW kg −1 with a energy density of 6.53 Wh kg −1 at 100 A g −1 . Our work is expected to open up new avenues for developing efficient nitrogen-doped porous carbon materials in a facile and viable way. Graphical abstract: A protocol for g-C3 N4 template-directed fabricating nitrogen-rich porous graphene-like carbon sheets (NPGCs) has been developed by using plasma-enhanced chemical vapor deposition followed with high-temperature pyrolysis. As supercapacitor electrode, the NPGCs deliver quite encouraging specific capacitance, high rate capability and outstanding cycle performance. Image 1