Enhanced charge-discharge characteristics of RuO2 supercapacitors on heat-treated TiO2 nanorods

被引：43

作者：

Ahn, Young Rack

Park, Chong Rae

Jo, Seong Mu

Kim, Dong Young ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Optoelect Mat Res Ctr, Seoul 136791, South Korea

[2] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul 151742, South Korea

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 12期

关键词：

D O I：

10.1063/1.2715038

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Electrochemical capacitors based on RuO2 were prepared onto electrospun TiO2 nanorods. Further heat treatment of the TiO2 at 800 degrees C under nitrogen was found to greatly improve the electrochemical performance of the RuO2 electrodes, especially at fast charge-discharge rates. The specific capacitance was found to decrease by only 33% when the scan rate increased from 10 to 1000 mV s(-1) (from 687 to 460 F g(-1)). The characteristic response time of the RuO2 electrode was found to be 0.15 s when a heat-treated TiO2 substrate was used, which is 20 times better than that of the pristine TiO2 used. (c) 2007 American Institute of Physics.

引用

页数：3

共 15 条

[1] Electrochemical capacitors based on electrodeposited ruthenium oxide on nanofibre substrates [J].

Ahn, Young Rack ;

Song, Mi Yeon ;

Jo, Seong Mu ;

Park, Chong Rae ;

Kim, Dong Young .

NANOTECHNOLOGY, 2006, 17 (12) :2865-2869

[2] Material characterization and electrochemical performance of hydrous manganese oxide electrodes for use in electrochemical pseudocapacitors [J].

Chang, JK ;

Tsai, WT .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (10) :A1333-A1338

[3] Coalescence inhibition of hydrous RuO2 crystallites prepared by a hydrothermal method [J].

Chang, Kuo-Hsin ;

Hu, Chi-Chang .

APPLIED PHYSICS LETTERS, 2006, 88 (19)

[4]

Conway B. E., 1999, ELECTROCHEMICAL SUPE

[5] Nanostructured transition metal oxides for aqueous hybrid electrochemical supercapacitors [J].

Cottineau, T ;

Toupin, M ;

Delahaye, T ;

Brousse, T ;

Bélanger, D .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2006, 82 (04) :599-606

[6] Carbon materials for the electrochemical storage of energy in capacitors [J].

Frackowiak, E ;

Béguin, F .

CARBON, 2001, 39 (06) :937-950

[7] Cyclic voltammetric deposition of hydrous ruthenium oxide for electrochemical capacitors [J].

Hu, CC ;

Huang, YH .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (07) :2465-2471

[8] Origami fabrication of nanostructured, three-dimensional devices: Electrochemical capacitors with carbon electrodes [J].

In, HJ ;

Kumar, S ;

Shao-Horn, Y ;

Barbastathis, G .

APPLIED PHYSICS LETTERS, 2006, 88 (08)

[9] Morphology and electrochemistry of ruthenium/carbon aerogel nanostructures [J].

Miller, JM ;

Dunn, B .

LANGMUIR, 1999, 15 (03) :799-806

[10] Electrochemically deposited nanowhiskers of nickel oxide as a high-power pseudocapacitive electrode [J].

Prasad, KR ;

Miura, N .

APPLIED PHYSICS LETTERS, 2004, 85 (18) :4199-4201

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