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- W2079896931 abstract "A series of novel ruthenium–manganese oxide (denoted as RunMn1−nOx) has been formed by oxidative co-precipitating. The precursor was obtained by mixing Mn(VII) (potassium permanganate), Mn(II) (manganese acetate) and Ru(III) (ruthenium chloride) in neutral aqueous solution at room temperature. The powder of RunMn1−nOx was obtained by calcinating the precursor at appropriate temperature. The crystalline structure and electrochemical performance of the powder have been studied as a function of the calcination temperature. At appropriate calcination temperature (e.g. 170 °C), the powder is in hydrous amorphous phase with a high specific capacitance. When the calcination temperature reaches up to 350 °C, the crystal form of α-MnO2 is formed, but the ruthenium oxide still keeps amorphous structure, which will lead to the decrease of specific capacitance of the composite electrode materials. The X-ray photoelectron spectroscopy (XPS) analysis shows that the powder of RunMn1−nOx prepared in this study belongs to the composite of RuO2–MnO2. The results from cyclic voltammetry (CV), chronopotentiometry and electrochemical impedance spectroscopy (EIS) indicate that the ruthenium weight density of 9 wt% in RunMn1−nOx can improve the cost-performance of ruthenium-manganese composite electrode." @default.
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- W2079896931 date "2009-05-01" @default.
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- W2079896931 title "Preparation and electrochemical performance of novel ruthenium–manganese oxide electrode materials for electrochemical capacitors" @default.
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- W2079896931 doi "https://doi.org/10.1016/j.jpcs.2009.03.015" @default.
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