An activated carbon with high capacitance from carbonization of a resorcinol-formaldehyde resin

被引:119
|
作者
Wen, Z. B. [1 ,2 ,3 ,4 ]
Qu, Q. T. [1 ,2 ]
Gao, Q. [3 ]
Zheng, X. W. [3 ]
Hu, Z. H. [3 ]
Wu, Y. P. [1 ,2 ]
Liu, Y. F. [3 ]
Wang, X. J. [3 ]
机构
[1] Fudan Univ, Dept Chem, NEML, Shanghai 200433, Peoples R China
[2] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China
[3] Tongji Univ, Dept Chem, Shanghai 200092, Peoples R China
[4] Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Peoples R China
基金
中国国家自然科学基金;
关键词
Supercapacitors; Polymeric activated carbon; High energy density; Electrode material; Micropore; DOUBLE-LAYER CAPACITANCE; ELECTROCHEMICAL PERFORMANCE; ELECTRODES;
D O I
10.1016/j.elecom.2009.01.015
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A polymeric activated carbon (PAC) was synthesized from the carbonization of a resorcinol-formaldehyde resin with KOH served as an activation agent. The nitrogen adsorption-desorption at 77 K, X-ray diffraction (XRD) and X-ray photorelectrom spectroscopy (XPS) were used to characterize the prepared PAC. Compared with the commercial activated carbon (Maxsorb: Kansai, Japan), PAC shows superior capacitive performance in terms of specific capacitance, power output and high energy density as electrode materials for supercapacitors. PAC presents a high specific capacitance of 500 F g(-1) in 6 mol l(-1) KOH electrolyte at a current density of 233 mA g(-1) which remained 302 F g(-1) even at a high current density of 4.6 A g(-1). The good electrochemical performance of the PAC was ascribed to well-developed micropores smaller than 1.5 nm, the presence of electrochemically oxygen functional groups and low equivalent series resistance. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:715 / 718
页数:4
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