Template-Free Synthesis of Ruthenium Oxide Nanotubes for High-Performance Electrochemical Capacitors

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• 作者：Ji-Young Kim ; Kwang-Heon Kim ; Hyun-Kyung Kim ; Sang-Hoon Park ; Kwang Chul Roh ; Kwang-Bum Kim
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 5, 2015
• 年：2015
• 卷：7
• 期：30
• 页码：16686-16693
• 全文大小：475K
• ISSN：1944-8252

文摘

One-dimensional, hydrous ruthenium oxide nanotubes (RuO₂路1.84H₂O) have been successfully achieved using a template-free, microwave-hydrothermal process. These were found to be amorphous in nature and have a large specific surface area of 250 m²路g^鈥?, producing a specific and volumetric capacitance of 511 F路g^鈥? and 531 F路cm^鈥?, respectively, at a discharging current density of 0.5 A路g^鈥?. When used as an electrode material in an electrochemical capacitor or ultracapacitor, they produced a significant improvement in capacitance, rate capability, and cyclability that can be attributed to the hollow nature of tubes allowing greater contact between the active surface of the electrode and the electrolyte.