MnO_2/13X分子筛复合材料的制备及电化学电容性能

Preparation and electrochemical capacitor performance of MnO_2/13X composite

采用化学沉淀法制备了MnO2/13X分子筛复合材料,并使用XRD对其结构进行了分析。在浓度为1mol·L–1、电位为–0.10～+0.58V的KOH电解液中,应用循环伏安和恒流充放电技术对该复合材料的电化学电容性能进行了研究。结果显示:在制得的MnO2/13X复合材料中,MnO2具有无定形结构。当MnO2质量分数为30%时,在100mA·g–1电流密度下,该复合材料的比电容达到134F·g–1,电化学电容性能良好。

MnO2/13X molecular sieve composite was prepared by the chem-mixed precipitation method,and its structure was characterized by XRD.In 1 mol·L–1 KOH electrolyte with a potential of –0.10～＋0.58 V,the electrochemical capacitor performance of this composite was investigated using the cyclic voltammetry and galvanostatic charge-discharge techniques.The results show that MnO2 contained in the prepared MnO2/13X composite are amorphous.MnO2/13X composite containing 30%（mass fraction） MnO2 exhibits good electrochemical capacitor performance,and its specific capacitance reaches 134 F·g–1 when the current density is 100 mA·g–1.