作　　者： ; ; ;

机构地区： 东莞理工学院

出　　处： 《稀有金属材料与工程》 2009年第5期930-934,共5页

摘　　要： 结合氧化钌理想的电化学赝电容特性和二氧化锰资源广泛、对环境友好的优势,采用氧化共沉淀法制备出Ru0.1Mn0.9Ox新型电化学电容器复合电极材料,通过循环伏安(CV)、计时电位(Chronopotentiometry)、交流阻抗(AC impedance)、热重-差热(TG/DSC)以及X射线衍射(XRD)等实验研究了电极材料的电化学赝电容性、阻抗特征、晶形结构及热处理温度对材料的晶形和赝电容的影响。结果表明:当热处理温度低于180℃时,可制备出稳定、非晶态的Ru0.1Mn0.9Ox;当温度为350℃时,复合材料中的无定形二氧化锰已转变为α-MnO2,掺杂的氧化钌晶形不变。与纯MnO2相比,Ru0.1Mn0.9Ox复合电极材料具有较低的极化内阻、较高的比电容、良好的电化学可逆性和显著的电化学赝电容特征。 （Based on respective Predominance of ruthenium oxide with ideal pseudocapacitance and manganese dioxide.with abundance natural resources and environment compatibility）, The novel composite eleeotrode materials of Ru0.1Mn0.9Ox for electrochemical capacltors were prepared by oxidation co-precipitation. The pseudocapacitance, impedance behavior, crystal structure of Ru0.1Mn0.9Ox and the effects of calcination temperature on the above mentioned properties were investigated by a series ,of tests Such as cyclie voltammetry（CV）, chronopotentiometry, AC impedance; TG/DSC and X-ray diffraction （XRD）, The experimental results show that a stable Ru0.1Mn0.9Ox with amorphous structure can be prepared at the calcinations temperature below 180℃. When the temperature roaches up to 350℃ the amorphous MnO2 in composite materials will change to the a-MnO2, but the crystal structure of ruthenium oxide keeps unchangeable. In comparison with pure MnO2, the Ru0.1Mn0.9Ox.posses a low polarization resistance, high specific capacitance, excellent electrochemical reversibility and distinct pseudoeapacitance charaeteristics

关 键 词： 赝电容 电化学电容器 钌 锰复合材料 氧化钌 二氧化锰

领　　域： [电气工程]