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Encapsulation of Nanodot Ruthenium Oxide into KB for Electrochemical Capacitors

2008; Institute of Physics; Volume: 156; Issue: 1 Linguagem: Inglês

10.1149/1.3021026

1945-7111

Katsuhiko Naoi, Shuichi Ishimoto, Nobuhiro Ogihara, Yumiko Nakagawa, Shun Hatta,

Advanced Battery Materials and Technologies

Nanosized hydrous /Ketjen Black (KB) composites were prepared using an in situ sol-gel process induced by ultracentrifugal mechanical force for supercapacitors. The hydrous in the prepared samples were nanosized particles ca. and were highly dispersed on conductive carbon (KB) even at high hydrous content . The composite annealed at exhibited the high specific capacitance of , which corresponds to a charge utilization as high as 96%. Such a high charge utilization could be because the nanoparticles have both outer and inner hydrous channels which facilitate ionic transport. A model capacitor assembled using the composite exhibited energy and power densities as high as and , respectively.