title: Enhanced Capacitive Performance of N-Doped Activated Carbon from Petroleum Coke by Combining Ammoxidation with KOH Activation.
abstract: Low cost with high specific capacitance and energy density is the critical and main requirement for practical supercapacitors. A novel N-doped activated carbon was fabricated by KOH activation of petroleum coke and ammonia treatment. The as-prepared carbon exhibits a high specific surface area (1875 m(2) g(-1)), excellent conductivity (57 S m(-1)), and rich nitrogen level (4.0 wt%). Those outstanding characters result in this porous carbon a hopeful electrode material for electrochemical supercapacitors. It shows high specific capacitance (up to 299 F g(-1)) and superior rate capability (76 % retention ratio at 20 A g(-1)) in 30 wt% KOH aqueous electrolyte. This efficient treatment method ensures its prosperous application in energy storage systems.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, School of Chemical Engineering, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Jufeng
authors.initials: J
authors.lastname: Huang
authors.affiliation: School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, People's Republic of China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Du
authors.affiliation: School of Science, State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, People's Republic of China. xingwei@upc.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Xing
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, CNPC, School of Chemical Engineering, China University of Petroleum, Qingdao, 266580, People's Republic of China. zfyancat@upc.edu.cn.
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Yan
keywords: Activated carbon; Nitrogen doping; Petroleum coke; Supercapacitor