Impregnation assisted synthesis of 3D nitrogen-doped porous carbon with high capacitance. (November 2015)

• Record Type: Journal Article
• Authors: Pu, Jun; Li, Chaowei; Tang, Lei; Li, Taotao; Ling, Lin; Zhang, Kai; Xu, Yancui; Li, Qingwen; Yao, Yagang
• Is Part Of: Carbon. Volume 94(2015)
• Page Start: 650
• Page End: 660
• Publication Date: 2015-11
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.07.058
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Three-dimensional (3D) porous carbons with controlled mesopore and micropore structures were prepared through a simple and low-cost ultrasonic and impregnation assisted method from waste air-laid paper. The ammonia management was used to dope the 3D porous carbons with different types of nitrogen heteroatoms in a way that replaced carbon atoms. The N2 adsorption–desorption characterization suggested that the nitrogen-doped carbons have a high surface area of 1470 m 2 g −1 with the average pore diameter of 4.2 nm, which are conducive to form electric double layer under high current density. The resulting 3D carbon exhibited a higher capacitance at 296 F g −1 in comparison with the nitrogen-free one at 252 F g −1 in 6 M KOH electrolyte. Moreover, a high power density ca. 0.313 kW kg −1 and energy density ca. 34.3 Wh kg −1 were achieved in the ionic liquid ([EMIm]BF4 ). The findings will open a new avenue to use waste materials for high-performance energy-storage devices.