title: Hierarchical activated mesoporous phenolic-resin-based carbons for supercapacitors.
abstract: A series of hierarchical activated mesoporous carbons (AMCs) were prepared by the activation of highly ordered, body-centered cubic mesoporous phenolic-resin-based carbon with KOH. The effect of the KOH/carbon-weight ratio on the textural properties and capacitive performance of the AMCs was investigated in detail. An AMC prepared with a KOH/carbon-weight ratio of 6:1 possessed the largest specific surface area (1118 m(2) g(-1)), with retention of the ordered mesoporous structure, and exhibited the highest specific capacitance of 260 F g(-1) at a current density of 0.1 A g(-1) in 1 M H2 SO4 aqueous electrolyte. This material also showed excellent rate capability (163 F g(-1) retained at 20 A g(-1)) and good long-term electrochemical stability. This superior capacitive performance could be attributed to a large specific surface area and an optimized micro-mesopore structure, which not only increased the effective specific surface area for charge storage but also provided a favorable pathway for efficient ion transport.
authors.affiliation: School of Materials Science and Engineering, East China University of Science and Technology, Mei Long Road 130, Shanghai 200237 (P. R. China), Fax: (+86) 21-64251509.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Wang
authors.forename: Min
authors.initials: M
authors.lastname: Zhou
authors.forename: Hao
authors.initials: H
authors.lastname: Chen
authors.forename: Jingui
authors.initials: J
authors.lastname: Jiang
authors.forename: Shiyou
authors.initials: S
authors.lastname: Guan
keywords: activation; carbon; electrochemistry; mesoporous materials; supercapacitors