title: Synthesis of Hierarchically Porous Sandwich-Like Carbon Materials for High-Performance Supercapacitors.
abstract: For the first time, hierarchically porous carbon materials with a sandwich-like structure are synthesized through a facile and efficient tri-template approach. The hierarchically porous microstructures consist of abundant macropores and numerous micropores embedded into the crosslinked mesoporous walls. As a result, the obtained carbon material with a unique sandwich-like structure has a relatively high specific surface (1235 m2g-1), large pore volume (1.30 cm3g-1), and appropriate pore size distribution. These merits lead to a comparably high specific capacitance of 274.8 F g-1at 0.2 A g-1and satisfying rate performance (87.7 % retention from 1 to 20 A g-1). More importantly, the symmetric supercapacitor with two identical as-prepared carbon samples shows a superior energy density of 18.47 Wh kg-1at a power density of 179.9 W kg-1. The asymmetric supercapacitor based on as-obtained carbon sample and its composite with manganese dioxide (MnO2) can reach up to an energy density of 25.93 Wh kg-1at a power density of 199.9 W kg-1. Therefore, these unique carbon material open a promising prospect for future development and utilization in the field of energy storage.
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Yiju
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
authors.forename: Chaoji
authors.initials: C
authors.lastname: Chen
authors.affiliation: Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai, 201620, P. R. China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Gao
authors.affiliation: Research Center of Shanxi Province for High Gravity Chemical Engineering and Technology, North University of China, Taiyuan, 030051, P. R. China.
authors.forename: Dongming
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Huang
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Pan
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Ke
authors.initials: K
authors.lastname: Ye
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Kui
authors.initials: K
authors.lastname: Cheng
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Dianxue
authors.initials: D
authors.lastname: Cao
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, P. R. China.
authors.forename: Guiling
authors.initials: G
authors.lastname: Wang
keywords: asymmetric supercapacitors; mesoporous materials; sandwich-like structure; symmetric supercapacitors; template synthesis