Expeditious fabrication of flower-like hierarchical mesoporous carbon superstructures as supercapacitor electrode materials

被引:73
|
作者
Liang, Jiyuan [1 ]
Chen, Shenglan [1 ]
Xie, Mingjiang [1 ]
Wang, Yongzheng [1 ]
Guo, Xiangke [1 ]
Guo, Xuefeng [1 ]
Ding, Weiping [1 ]
机构
[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem, Nanjing 210093, Jiangsu, Peoples R China
基金
美国国家科学基金会;
关键词
CAPACITIVE ENERGY-STORAGE; DOUBLE-LAYER CAPACITORS; HIGH-PERFORMANCE SUPERCAPACITORS; LITHIUM-ION BATTERIES; POROUS CARBON; ELECTROCHEMICAL CAPACITORS; NANOSTRUCTURES; TEMPLATE; NANOFIBERS; TRANSPORT;
D O I
10.1039/c4ta03209h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report a facile and efficient strategy for preparing flower-like hierarchical mesoporous carbon superstructures (FMCS) through a one-pot hydrothermal reaction of nickel acetate with glucose. In the fabrication process of FMCS, the nickel acetate ingeniously plays multifunctional roles: as inducer of flower-like hierarchical carbon, as catalyst of graphitization, and as pore-forming agent. First, flower-like Ni(OH)(2)/polysaccharide rnicrospheres were self-assembled via a hydrothermal reaction at 180 degrees C for 24 h. Second, flower-like mesoporous carbon superstructures were obtained by etching and removing the Ni from the Ni/C precursor carbonized from the Ni(OH)(2)/polysaccharide microspheres. The obtained flower-like superstructures are composed of two-dimensional mesoporous carbon petal building blocks, with a thickness of 20 nm. Electrochemical data showed that the product FMCS-1 displayed a specific capacitance of 226 F g(-1) at 0.5 A g(-1), and retained 82% (185 F g(-1)) at a high current density of 20 A g(-1), indicative of outstanding rate capability. Furthermore, the three-dimensional (3D) flower-like hierarchical mesoporous carbon superstructures demonstrated excellent cycling stability, with approximately 100% retention of the initial specific capacitance after 2000 cycles at a current density of 10 A g(-1).
引用
收藏
页码:16884 / 16891
页数:8
相关论文
empty
未找到相关数据