Nanowindow-Regulated Specific Capacitance of Supercapacitor Electrodes of Single-Wall Carbon Nanohorns
Cheol‐Min Yang(Japan Science and Technology Agency), Yong‐Jung Kim(Chiba University), Morinobu Endo(Japan Science and Technology Agency), Hirofumi Kanoh(Japan Science and Technology Agency), Masako Yudasaka(Japan Science and Technology Agency), Sumio Iijima(Chiba University), Katsumi Kaneko(Japan Science and Technology Agency)
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Abstract
The solvated ion size of electrolytes increases in the following order; SO42-(H2O)12 (0.53 nm) < (C2H5)4N+·7acetonitrile (Et4N+·7ACN, 1.30 nm) < (C2H5)4N+·4propylene carbonate (Et4N+·4PC, 1.35 nm). The size difference between the nanowindows of single-wall carbon nanohorns and the solvated ions of electrolytes should be an important factor in the accessibility of the ions to the internal spaces through the nanowindow.
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