低温水热法合成花瓣状的CuCo_2S_4作为高性能的超级电容器电极材料

Low Temperature Fabrication of Petal CuCo_2S_4 as Electrode Materials for High Performance Supercapacitors

花瓣形状的CuCo_2S_4作为超级电容器的电极材料在低温下(90℃)通过两步水热法合成。它的结构和形貌通过场发射扫描电镜(SEM)、高分辨透射电镜(HRTEM)、X射线衍射(XRD)来表征。通过SEM可以看出它的形貌是花瓣状,由很多纳米片组成,结构尺寸大概为3~5μm。特殊的结构和大的比表面积提供更多的活性位点,使得CuCo_2S_4展现出优越的赝电容。在电流密度1A g^(-1)时,CuCo_2S_4比电容为1244F g^(-1)。结果表明,低温水热法是一种前景广阔的制备电容器材料的方法。

Petal-shaped CuCo2S4 as a supercapacitor electrode material at low temperature （90℃） through two-step hydrothermal synthesis. The structures and morphologies were characterized by field emission scanning electron microscopy （SEM）, high resolution transmission electron microscopy （HRTEM） and X-ray diffraction （XRD）. Through the SEM can be seen thai its shape is petal-shaped by a number of nanoplates, the structure size of about 3-5 μm. The special structure and the large specific surface area provide more active sites for CuCo2S4 to exhibit superior pseudostruetures. At a current density of 1A g-1 the CuCozS4 specific capacitance is 1244F g-1 These results show that low temperature hydrothermal method is a promising method for preparing capacitor materials.