title: Nitrogen-doped hierarchical porous carbon with high surface area derived from graphene oxide/pitch oxide composite for supercapacitors.
abstract: A nitrogen-doped hierarchical porous carbon has been prepared through one-step KOH activation of pitch oxide/graphene oxide composite. At a low weight ratio of KOH/composite (1:1), the as-prepared carbon possesses high specific surface area, rich nitrogen and oxygen, appropriate mesopore/micropore ratio and considerable small-sized mesopores. The addition of graphene oxide plays a key role in forming 4 nm mesopores. The sample PO-GO-16 presents the characteristics of large surface area (2196 m(2) g(-1)), high mesoporosity (47.6%), as well as rich nitrogen (1.52 at.%) and oxygen (6.9 at.%). As a result, PO-GO-16 electrode shows an outstanding capacitive behavior: high capacitance (296 F g(-1)) and ultrahigh-rate performance (192 F g(-1) at 10 A g(-1)) in 6 M KOH aqueous electrolyte. The balanced structure characteristic, low-cost and high performance, make the porous carbon a promising electrode material for supercapacitors.
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China. Electronic address: fdoy_lt54@163.com.
authors.forename: Chang
authors.initials: C
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Sheng
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Haixia
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Ranran
authors.initials: R
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Xie
authors.affiliation: State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China. Electronic address: shijingli1963@163.com.
authors.forename: Jingli
authors.initials: J
authors.lastname: Shi
keywords: Graphene oxide; Hierarchical pore; Nitrogen-doped; Pitch oxide; Supercapacitors