In this study, nickel sulfide (NiS), zinc sulfide (ZnS), and their composites have been synthesized by using surfactant driven hydrothermal method. Synthesized materials are investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared spectroscopy, UV–Vis and Photoluminescence spectroscopy. XRD results have shown the presence of corresponding structural planes. Crystallite size was much smaller (15 nm) in the case of ZnS nanomaterials, whereas, composite materials have shown size comparable to NiS nanomaterials. SEM images presented morphology of star-like, spherical, and mixture of two for NiS, ZnS, and NiS/ZnS nanocomposites respectively. EDX spectrum of composite materials showed Nickel, Zinc, and Sulfur, indicating the purity of the synthesized composite. Electrochemical measurements i.e. cyclic voltammetry and galvanostatic charge–discharge were determined for all three materials. Maximum specific capacitance is obtained as 1594.68 F g⁻¹ at a scan rate of 5 mV S⁻¹ for NiS/ZnS composite materials whereas a charging/discharging time of 461.97 s is observed. The composite materials have shown 95.4% retention for applied for 3000 charging–discharging cycles. The favorable behavior of NiS/ZnS composites indicated their potential as an electrode material for pseudo-capacitors.

本研究采用表面活性剂驱动的水热法合成了硫化镍 (NiS)、硫化锌 (ZnS) 及其复合材料。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDX)、傅里叶变换红外光谱、UV-Vis 和光致发光光谱研究合成材料。XRD结果表明存在相应的结构面。ZnS 纳米材料的微晶尺寸要小得多（15 nm），而复合材料的尺寸与 NiS 纳米材料相当。SEM 图像分别显示了 NiS、ZnS 和 NiS/ZnS 纳米复合材料的星形、球形和两者混合物的形态。复合材料的 EDX 光谱显示镍、锌和硫，表明合成复合材料的纯度。电化学测量，即循环伏安法和恒电流充放电对所有三种材料都进行了测定。获得的最大比电容为 1594.68 F g^-1在 5 mV S ^-1的扫描速率下对于 NiS/ZnS 复合材料，观察到充电/放电时间为 461.97 s。复合材料在应用 3000 次充放电循环后显示出 95.4% 的保留率。NiS/ZnS 复合材料的良好行为表明它们具有作为赝电容器电极材料的潜力。