Nitrogen-doped hierarchical porous carbon with high surface area derived from graphene oxide/pitch oxide composite for supercapacitors

Yuan Ma; Chang Ma; Jie Sheng; Haixia Zhang; Ranran Wang; Zhenyu Xie; Jingli Shi

doi:10.1016/j.jcis.2015.08.065

Nitrogen-doped hierarchical porous carbon with high surface area derived from graphene oxide/pitch oxide composite for supercapacitors

J Colloid Interface Sci. 2016 Jan 1:461:96-103. doi: 10.1016/j.jcis.2015.08.065. Epub 2015 Aug 28.

Authors

Yuan Ma¹, Chang Ma², Jie Sheng¹, Haixia Zhang¹, Ranran Wang¹, Zhenyu Xie¹, Jingli Shi³

Affiliations

¹ State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
² 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.
³ 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.

PMID: 26397915
DOI: 10.1016/j.jcis.2015.08.065

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.

Keywords: Graphene oxide; Hierarchical pore; Nitrogen-doped; Pitch oxide; Supercapacitors.