Preparation and performance of straw based activated carbon for supercapacitor in non-aqueous electrolytes

被引:134
作者
Li, Xueliang [1 ]
Han, Changlong [1 ]
Chen, Xiangying [1 ]
Shi, Chengwu [1 ]
机构
[1] Hefei Univ Technol, Sch Chem Engn, Anhui Key Lab Controllable Chem React & Mat Chem, Hefei 230009, Anhui, Peoples R China
关键词
Activated carbon; EDLCs; Organic electrolytes; Specific surface area; Accessible volume; DOUBLE-LAYER CAPACITANCE; ELECTROCHEMICAL PERFORMANCE; KOH ACTIVATION; PORE STRUCTURE; NEEDLE COKE; ELECTRODES; SPHERES; EDLC;
D O I
10.1016/j.micromeso.2010.01.007
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The activated carbon with honeycomb-like morphology for electrochemical double layer capacitors (EDLCs) was prepared from wheat straw by carbonization and subsequent activation with KOH. The product presented micro- and mesoporous structure with the peak pore size of 2.1 nm and high specific surface area of 2316 m(2)/g. The electrochemical capacitance performances of the activated carbon as EDLC electrodes were characterized by using cyclic voltammetry (CV), alternating current (AC) impedance. The specific capacitance of the activated carbon reached 251.1 Fig at 2 mV/s scan rate in the electrolyte of MeEt(3)NBF(4)/AN. The thermal gravimetric analysis of AN impregnated carbon was explored as a new approach to investigate the effectivity of pore for the electrolytes. The relationships between specific capacitance and scan rate, surface area and pore diameter were discussed. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:303 / 309
页数:7
相关论文
共 29 条
[1]  
[Anonymous], 1999, ELECTROCHEMICAL SUPE
[2]   High temperature carbon-carbon supercapacitor using ionic liquid as electrolyte [J].
Balducci, A. ;
Dugas, R. ;
Taberna, P. L. ;
Simon, P. ;
Plee, D. ;
Mastragostino, M. ;
Passerini, S. .
JOURNAL OF POWER SOURCES, 2007, 165 (02) :922-927
[3]   Capacitance limits of high surface area activated carbons for double layer capacitors [J].
Barbieri, O ;
Hahn, M ;
Herzog, A ;
Kötz, R .
CARBON, 2005, 43 (06) :1303-1310
[4]   Chemical and electrochemical characterization of porous carbon materials [J].
Bleda-Martinez, M. J. ;
Lozano-Castello, D. ;
Morallon, E. ;
Cazorla-Amoros, D. ;
Linares-Solano, A. .
CARBON, 2006, 44 (13) :2642-2651
[5]   Role of surface chemistry on electric double layer capacitance of carbon materials [J].
Bleda-Martínez, MJ ;
Maciá-Agulló, JA ;
Lozano-Castelló, D ;
Morallón, E ;
Cazorla-Amorós, D ;
Linares-Solano, A .
CARBON, 2005, 43 (13) :2677-2684
[6]  
Chmiola J, 2006, SCIENCE, V313, P1760, DOI 10.1126/science/1132195
[7]  
Ci Y, 2007, CHINESE J INORG CHEM, V23, P365
[8]   Effect of pore size distribution of coal-based activated carbons on double layer capacitance [J].
Gryglewicz, G ;
Machnikowski, J ;
Lorenc-Grabowska, E ;
Lota, G ;
Frackowiak, E .
ELECTROCHIMICA ACTA, 2005, 50 (05) :1197-1206
[9]   Performance of electrical double layer capacitors with porous carbons derived from rice husk [J].
Guo, YP ;
Qi, JR ;
Jiang, YQ ;
Yang, SF ;
Wang, ZC ;
Xu, HD .
MATERIALS CHEMISTRY AND PHYSICS, 2003, 80 (03) :704-709
[10]   Electrochemical performance of nitrogen-enriched carbons in aqueous and non-aqueous supercapacitors [J].
Hulicova, D ;
Kodama, M ;
Hatori, H .
CHEMISTRY OF MATERIALS, 2006, 18 (09) :2318-2326