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Nanocrystalline ruthenium oxide of fine mesoporosity prepared by templating for electrochemical capacitor applications |
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| Authors: | Chun-Kuo Min Tai-Bor Wu Wei-Ta Yang Chun-Long Li |
| Affiliation: | 1. Department of Materials Science and Engineering, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu 300, Taiwan, ROC;2. Material and Chemical Laboratories, Industrial Technology Research Institute, Rm. 1201, Bldg. 51, 195, Sec. 4, Chung Hsing Road, Chutung, Hsinchu 310, Taiwan, ROC |
| Abstract: | Hydrous ruthenium-oxide (RuOxHy) particles composed of nanocrystallites of ～5 nm in size were prepared, using hexagonal self-ordered mesoporous SiO2 (SBA-15) as a template and RuCl3 as the ruthenium precursor. The material has a highly mesoporous structure with a sharp distribution of fine pores of size around 3–4 nm. A high specific capacitance of 954 F g?1 for the RuOxHy in 1 M H2SO4(aq) and a high energy density of 118.9 J g?1 (or 32.7 W h kg?1) were obtained from an electrochemical capacitor made with the material. Rectangular shape of the cyclic voltammetry was observed even increasing the scan rate to about 100 mV s?1. |
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