One-pot synthesis of nitrogen-doped ordered mesoporous carbon spheres for high-rate and long-cycle life supercapacitors. (February 2018)

• Record Type: Journal Article
• Authors: Wang, Jian-Gan; Liu, Hongzhen; Sun, Huanhuan; Hua, Wei; Wang, Huwei; Liu, Xingrui; Wei, Bingqing
• Is Part Of: Carbon. Volume 127(2018)
• Page Start: 85
• Page End: 92
• Publication Date: 2018-02
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.10.084
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Nitrogen-doped ordered mesoporous carbon spheres (N-OMCS) were prepared by a facile one-pot soft-templating and one-step pyrolysis method. The as-obtained N-OMCS possesses an average diameter of around 300 nm, a moderate specific surface area of 439 m 2 g −1 and uniform mesopore size at around 5.0 nm. Owing to the ordered meso-structure and nitrogen doping, the N-OMCS materials, when used as supercapacitor electrodes, delivers a high specific capacitance of 288 F g −1 at a current density of 0.1 A g −1 . More remarkably, the N-OMCS electrode shows excellent rate capability with 66% capacitance retention at an ultrahigh current density of 50 A g −1 and outstanding cycling stability with almost no degradation over 25, 000 cycles. The work would open up a new avenue to synthesize carbon spheres with mesoporous structure and nitrogen doping for high-performance supercapacitor applications. Graphical abstract: