Facile synthesis and electrochemical properties of RuO2 nanofibers with ionically conducting hydrous layer

Title
Facile synthesis and electrochemical properties of RuO2 nanofibers with ionically conducting hydrous layer
Authors
현태선Harry L. Tuller윤두영김호기김일두
Keywords
*2010기관고유사업 평가에 반영 완료
Issue Date
2010-10
Publisher
Journal of materials chemistry
Citation
VOL 20, NO 41, 9172-9179
Abstract
The facile synthesis, by electrospinning of highly conductive RuO2 fiber mats as the conducting core of electrochemical capacitors, is reported. Electrospun RuO2 fiber mats, calcined at 400 ℃, exhibited highly porous morphologies composed of crystalline RuO2 nano-particles with an average particle size of 10 nm. The highly conducting (σ = 288 S cm-1) fiber mats were used as the basis of a hybrid electrochemical capacitor in which the fiber mats served as the conducting core for electrochemically deposited hydrate RuO2ㆍnH2O overlayers. These electrochemical capacitors exhibited superior characteristics: a high specific capacitance of ~886.9 F g-1 (based on the mass of the hydrous RuO2 coating layer) at scan rate of 10 mV s-1 and high rate capability with a capacity loss of only 30% from 10 to 2000 mV s-1. This is attributed to the superior electron transport pathways provided by the fiber mat core to the upper ionically conducting hydrous RuO2 coating layer.
URI
http://pubs.kist.re.kr/handle/201004/38169
ISSN
0959-9428
Appears in Collections:
KIST Publication > Article
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