无定形纳米级MnO_2电极材料的制备及其准电容性能

Fabrication and pseudocapacitance performance of Nano-MnO_2 electrode material

采用化学沉淀法制备了无定形纳米级粉末MnO2电极材料,运用X射线衍射(XRD)、X射线光电子能谱(XPS)、热重分析和充放电容量测量法及循环伏安等方法对MnO2制备、准电容形成机理进行了理论探讨.使用0.1 mol/L Na2SO4为电解液、烧结温度为80℃时能得到比电容最大的MnO2材料,其实际电容约为136 F/g.

Powder MnO2 electrode materials of electrochemical capacitors was firstly fabricated using chemical precipitation method. The preparation of MnO2, the mechanism of pseudocapacitance was discussed by XRD, XPS, TGA, charge - discharge and cyclic voltammetry methods. The highest specific capacitance is obtained when calcinating temperature is 80℃, offering about 136F/g actually.