Coaxial RuO2–ITO Nanopillars for Transparent Supercapacitor Application

Supercapacitive properties of ruthenium oxide (RuO2) nanoparticles electrodeposited onto the indium tin oxide (ITO) nanopillars were investigated. Compared to conventional planar current collectors, this coaxially nanostructured current collector–electrode system can provide increased contact for ef...

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Published in:Langmuir 2014-02, Vol.30 (6), p.1704-1709
Main Authors: Ryu, Ilhwan, Yang, MinHo, Kwon, Hyemin, Park, Hoo Keun, Do, Young Rag, Lee, Sang Bok, Yim, Sanggyu
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container_issue 6
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container_title Langmuir
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creator Ryu, Ilhwan
Yang, MinHo
Kwon, Hyemin
Park, Hoo Keun
Do, Young Rag
Lee, Sang Bok
Yim, Sanggyu
description Supercapacitive properties of ruthenium oxide (RuO2) nanoparticles electrodeposited onto the indium tin oxide (ITO) nanopillars were investigated. Compared to conventional planar current collectors, this coaxially nanostructured current collector–electrode system can provide increased contact for efficient charge transport, and the internanopillar spacing allows easy access of electrolyte ions. The morphological and electrochemical properties depended on the thickness of the RuO2 layers, i.e., the number of electrodeposition cycles. A maximum specific capacitance, C sp, of 1235 F/g at a scan rate of 50 mV/s was achieved for the 30-cycle deposited RuO2–ITO nanopillars. The other capacitive properties such as electrochemical reversibility and C sp retention at high scan rates also improved greatly.
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title Coaxial RuO2–ITO Nanopillars for Transparent Supercapacitor Application
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