摘要
采用水热法以KMnO_4和MnSO_4为原料,Al(NO_3)_3为铝源,制备出了Al掺杂的二氧化锰纳米线。通过扫描电子显微镜(SEM)和X线衍射仪(XRD)分别对样品的形貌和结构进行表征,并使用循环伏安法(CV)、恒流充放电等方法研究了样品的电化学性能。结果表明,当添加适量Al(NO_3)_3制备出直径约?10nm、长约80nm的纳米球线。当Al(NO_3)_3的摩尔比为1mmol,电流密度为2mA/cm~2时,面电容为1 127mF/cm~2,比相同条件下纯二氧化锰容量高65%,表现出良好的电化学性能。
The Al-doped manganese dioxide nanowire has been prepared with the hydrothermal method by using KMnO_4 and MnSO_4 as raw materials.The structure and morphology of samples are characterized through scanning electron microscope(SEM)and X-ray diffraction(XRD)respectively.Besides,the electrochemical performance of the sample is studied with the cyclic voltammetry(CV)and constant current charge and discharge methods.The results show that the nanosphere wires with a diameter of about ?10nm and a length of 80 nm are prepared when appropriate amount of Al(NO_3)_3 is added.When 1mmol of Al(NO_3)_3 is added,the capacitance is 1 127mF/cm~2 under 2mA/cm~2 of current density,which is 65% higher than that of pure manganese dioxide under the same conditions,showing good electrochemical performance.
引文
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