Coaxial RuO2–ITO Nanopillars for Transparent Supercapacitor Application

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• 作者：Ilhwan Ryu ; MinHo Yang ; Hyemin Kwon ; Hoo Keun Park ; Young Rag Do ; Sang Bok Lee ; Sanggyu Yim
• 刊名：Langmuir
• 出版年：2014
• 出版时间：February 18, 2014
• 年：2014
• 卷：30
• 期：6
• 页码：1704-1709
• 全文大小：376K
• ISSN：1520-5827

文摘

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鈥揺lectrode 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鈥揑TO nanopillars. The other capacitive properties such as electrochemical reversibility and C_sp retention at high scan rates also improved greatly.