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Issue 41, 2010
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Facile synthesis and electrochemical properties of RuO2 nanofibers with ionically conducting hydrous layer

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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 °C, 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 RuO2·nH2O 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.

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

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Publication details

The article was received on 24 Feb 2010, accepted on 30 Jun 2010 and first published on 10 Sep 2010


Article type: Paper
DOI: 10.1039/C0JM00494D
J. Mater. Chem., 2010,20, 9172-9179

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

    T. Hyun, H. L. Tuller, D. Youn, H. Kim and I. Kim, J. Mater. Chem., 2010, 20, 9172
    DOI: 10.1039/C0JM00494D

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