【摘要】 采用回流法以KMn O4和Mn SO4为前驱体,硫酸亚铁铵[(NH4)2Fe(SO4)2]为铁源,制备出Fe掺杂的Mn O2纳米棒。通过X射线衍射仪、扫描电子显微镜对样品的结构和形貌进行表征,并使用循环伏安法、恒电流充放电法研究了样品的电化学性能。结果表明:当使用合适量的(NH4)2Fe(SO4)2时,制备出直径约为80 nm,长度为0.8~2μm的Fe掺杂Mn O2纳米棒。作为电极材料,Fe掺杂Mn O2纳米棒表现出良好的电化学性能,在1.0 A/g电流密度下,比电容达到620 F/g,比相同条件下纯Mn O2的容量高出56%。更多还原

【Abstract】 Fe-doped manganese dioxide nanorods were synthesized by a facile method through simply refluxing the reaction mixture of KMn O4 and Mn SO4 solution in the presence of ammonium ferrous sulfate [(NH4)2Fe(SO4)2].The structure and morphology of the products were characterized by X-ray powder diffraction(XRD) and scanning electron microscopy(SEM).The capacitive performance of manganese dioxide was studied by cyclic voltammetry(CV) and galvanostatic charge-discharge.The Fe-doped Mn O2 nanorods have an average diameter of 80 nm and its length is 0.8-2 mm.The nanorods exhibit excellent electrochemical performance as electrode material for supercapacitors.Its specific capacitance reaches up to 620 F/g at a current density of 1.0 A/g,about 56% higher than that of pure Mn O2.更多还原