Co-Al双金属硫化物/泡沫镍电极材料的制备及其超级电容性能研究

Preparation of Co-Al Bimetallic Sulfide/Nickel Foam Electrodes and Their Supercapacitor Properties

采用两步水热法直接将Co-Al双金属硫化物生长在泡沫镍上,成功制备了CoAl_2S_4/Ni电极材料。利用X射线衍射、扫描电镜和电化学测试等手段对其结构、形貌和超级电容性能进行了表征。结果表明,CoAl_2S_4/Ni电极材料呈现花瓣状的三维多孔结构,表面粗糙,这种结构有利于电解液和电极材料的充分接触,具有良好的导电性和比电容性能;当电流密度为1A/g时,电极的放电比容量高达2187.1F/g,循环100次后比电容的保持率为90.1%。相关研究可为超级电容器电极材料的制备及性能研究提供思路。

The binary Co-Al sulfide was grown directly on Ni foams via a two-step hydrothermal method. The CoAl2S4/Ni electrode material were successfully prepared. The structure, surface morphology and supercapacitor property were characterized by X-ray diffraction analysis, field emission scanning electron microscopy （FESEM） , and electrochemical method respectively. The results showed that the CoAl2S4/Ni electrode material exhibits 3D porous petal-like structure and rough surface with high conductivity, capacitance and transport rate for electrolyte ions and electrons. The specific capacitance of the electrode can reach 2187. 1 F/g under current density of 1A/g. It displayed good electrochemical stability with 90. 1% of the initial capacitance over consecutive 100 cycles. The results of this work can provide a reference for the fabrication and properties study of supercapacitor electrode materials.