二氧化锰的机械化学法制备及其性能

Mechanochemical Synthesis and Characterization of Manganese Dioxide

采用机械化学法制备了高比容量MnO2电容材料,考察了高锰酸钾与乙酸锰配比对产物结构及电化学性能的影响。用XRD对材料的结构进行了表征;用循环伏安、交流阻抗、恒电流充放电等方法分别研究了MnO2电极和超级电容器在6mol/LKOH水系电解液中的电化学性能。结果表明,当原料摩尔配比为1:1时,所得产物为无定型MnO2,其电极最大放电容量达到了536F/g。

High capacitance MnO2 was prepared via mechanochemical route, the influence of mole ratio KM- nO4：Mn（CH3COO）2 on the performance of that was discussed. The microstructure of synthesized MnO2 was investigated by XRD, and the electrochemical performances of MnO2 electrodes and supercapacitors assembled were investigated by cyclic voltammetry, a. c. impedance, and galvanostatic testing in 6 mol/L KOH. The results showed that when the mole ratio was 1 ： 1, the product had an amorphous structure, the maximum single electrode discharge capacitance was as high as 536 F/g.