水溶液中でのガルバノ電析で作製した酸化マンガン電極の充放電特性

概要

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Energy storage devices with high energy density have been used in many electronic devices in recently years. A supercapacitor is one such device, but lower energy density has limited its applications. In this study, manganese oxide deposited on a titanium substrate at various deposition temperatures using the galvanostatic electrodeposition method as the electrodes of a supercapacitor was investigated. The specific capacitance of a supercapacitor is depended on the deposition temperature and is affected by the surface morphology and roughness of the electrode surface. At a deposition temperature of 15℃, manganese oxide showed a needle-like appearance, a roughness of 60.0 nm, and a maximum specific capacitance of 225.3 Fg^<-1>. The charging/discharging behavior of a supercapacitor was analyzed in 0.1 M Na_2SO_4 aqueous electrolyte at various measuring temperatures and operating potential voltage ranges. The supercapacitor achieved a high energy density of 37.70 Whkg^<-1> in a 0.1 M Na_2SO_4 electrolyte at 25℃ in an operation range of 0 to 1.3 V.
社団法人日本セラミックス協会の論文
2007-05-01