水热法制备不同形貌二硫化钼及其电化学电容性能

Preparation of molybdenum disulfide with various morphologies by using hydrothem method and their electrochemical capacitance performance

以水热法制备不同形貌的二硫化钼电极材料,研究材料形貌对其电化学性能的影响.采用X射线衍射(XRD),扫描电子显微镜(SEM)和拉曼光谱(Raman)对制备的二硫化钼进行形貌、成分、结构表征,采用循环伏安法和恒电流充放电法测定纳米二硫化钼作为电极材料的电化学性能.结果表明:制备的不同形貌的二硫化钼中镂空网状二硫化钼的比电容高于三维花状二硫化钼以及空心球状二硫化钼和块状二硫化钼的比电容.三维花状二硫化钼和镂空状二硫化钼作为超级电容器的电极材料,具有较好的电化学电容性能,在电流密度为1A/g、1mol的Na_2SO_4电解液中其比电容分别达到203、259F/g.

Morphology-diverse molybdenum disulfide electrode materials were prepared with hydrotherm method and the influence of their morphology on their electrochemical performance was investigated. X-ray diffraction（XRD）, scanning electron microscopy （SEM）, and Raman spectroscopy （Raman） were used to characterize their morphology, composition, and structure. The electrochemical behavior of the morpholo- gy-diverse molybdenum disulfide as electrode material were tested by means of cyclic voltammetry（CV） and galvanostatic charge-discharge test, respectively. The result showed that among the prepared molyb- denum disulfide with various morphology, the specific capacitance of the hollowed-out reticulate molybde- num disulfide would be higher than that of the three-dimensional flower-shaped one, hollow spherical one, and blocked one. The three-dimensional flower-shaped and hollowed-out reticulate molybdenum disulfide as supercapacitor electrode material would have a better electrochemical capacitance performance and their specific capacitance reached up to 203 F/g and 259 F/g when current density was 1 A/g in 1 tool Na2 SO4 electrolyte, respectively.