Carbon nanotube/RuO2 nanocomposite electrodes for supercapacitors

被引:175
作者
Park, JH [1 ]
Ko, JM
Park, OO
机构
[1] Korea Adv Inst Sci & Technol, Dept Chem Engn, Ctr Adv Funct Polymer, Taejon 305701, South Korea
[2] Hanbat Natl Univ, Dept Chem Technol, Taejon 305719, South Korea
关键词
D O I
10.1149/1.1576222
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrochemical characteristics of electrodes for supercapacitors built from RuO2/multiwalled carbon nanotube (CNT) nanocomposites have been investigated. Capacitances have been estimated by cyclic voltammetry at different scan rates from 5-50 mV/s. Electrostatic charge storage as well as pseudofaradaic reactions of RuO2 nanoparticles have been affected by the surface functionality of CNTs due to the increased hydrophilicity. Such hydrophilicity enables easy access of the solvated ions to the electrode/electrolyte interface, which increases faradaic reaction site number of RuO2 nanoparticles. The specific capacitance of RuO2/pristine CNT nanocomposites based on the combined mass was about 70 F/g (RuO2 : 13 wt % loading), and the specific capacitance based on the mass of RuO2 was 500 F/g. However, the specific capacitance of RuO2/hydrophilic CNT nanocomposites based on the combined mass was about 120 F/g (RuO2 : 13 wt % loading), and the specific capacitance based on the mass of RuO2 was about 900 F/g. (C) 2003 The Electrochemical Society.
引用
收藏
页码:A864 / A867
页数:4
相关论文
共 28 条
[1]  
An KH, 2001, ADV MATER, V13, P497, DOI 10.1002/1521-4095(200104)13:7<497::AID-ADMA497>3.0.CO
[2]  
2-H
[3]  
Arbizzani C., 1997, HDB ORGANIC CONDUCTI, V4, P595
[4]  
BURKE A, 2001, P 11 INT SEM DOUBL L
[5]   Carbon nanotubule membranes for electrochemical energy storage and production [J].
Che, GL ;
Lakshmi, BB ;
Fisher, ER ;
Martin, CR .
NATURE, 1998, 393 (6683) :346-349
[6]   Electrochemical characterization of carbon nanotubes as electrode in electrochemical double-layer capacitors [J].
Chen, JH ;
Li, WZ ;
Wang, DZ ;
Yang, SX ;
Wen, JG ;
Ren, ZF .
CARBON, 2002, 40 (08) :1193-1197
[7]  
CONWAY BE, 1993, ELECTROCHEMICAL SOC, V9323, P15
[8]   Supercapacitors based on nanostructured carbon electrodes grown by cluster-beam deposition [J].
Diederich, L ;
Barborini, E ;
Piseri, P ;
Podestà, A ;
Milani, P ;
Schneuwly, A ;
Gallay, R .
APPLIED PHYSICS LETTERS, 1999, 75 (17) :2662-2664
[9]   Electrochemical storage of lithium multiwalled carbon nanotubes [J].
Frackowiak, E ;
Gautier, S ;
Gaucher, H ;
Bonnamy, S ;
Beguin, F .
CARBON, 1999, 37 (01) :61-69
[10]   Supercapacitor electrodes from multiwalled carbon nanotubes [J].
Frackowiak, E ;
Metenier, K ;
Bertagna, V ;
Beguin, F .
APPLIED PHYSICS LETTERS, 2000, 77 (15) :2421-2423