Three-dimensionally Hierarchical Porous Carbon Creating High-performance Electrochemical Capacitors

被引：24

作者：

Han, Yan ^{[1
]}

Liu, Shuangxi ^{[2
]}

Li, Dejun ^{[1
]}

Li, Xifei ^{[1
]}

机构：

[1] Tianjin Normal Univ, Coll Phys & Mat Sci, Energy & Mat Engn Ctr, Tianjin 300387, Peoples R China

[2] Nankai Univ, Coll Chem, Inst New Catalyt Mat Sci, Tianjin 300071, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 138卷

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Hierarchical porous carbon; Hydrothermal treatment; Carbon hollow-spheres; Electrochemical capacitors; DOUBLE-LAYER CAPACITANCE; MESOPOROUS CARBON; ENERGY-STORAGE; ACTIVATED CARBON; SUPERCAPACITORS; ELECTRODES; NANOCOMPOSITES; GRAPHENE; SPHERES;

D O I：

10.1016/j.electacta.2014.06.107

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Three-dimensionally (3D) hierarchical porous carbon has been prepared through a simple and efficient hydrothermal treatment on colloidal silica as template. Nitrogen adsorption-desorption isotherms and transmission electron microscope images reveal that the porous carbon has a unique 3D interconnected micro-, mesa- and macroporous network. The observed 3D interconnected meso/macroporous network originates from the cores of carbon hollow-spheres and the aggregation of crosslinked carbon hollow-spheres, and the micropores exist from the 3D interconnected network inside the shells of carbon hollow-spheres. The electrochemical capacitive tests indicate that the porous carbons exhibit large specific capacitance of about 300 F g(-1) at 1 A g(-1) in 6 M KOH aqueous electrolyte as well as high capacitance retention of 71% when the current density increased by 10 times. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：193 / 199

页数：7

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