Copper sulphide nanocrystals (NCs) and their derivatives are rapidly gaining attention of researchers due to wide variety of exciting physical properties. These properties can be further tuned by varying morphology and incorporation of suitable elements. Here, we report a simple and facile method for the synthesis of hierarchical flower shape CuS containing 30–40 nm thick nanosheets and Ni–CuS nanocomposite with varying molar ratio of Ni to CuS. It is observed that the formation of hierarchical flower shape of CuS is significantly depend on the type of sulfur source and metal to sulfur precursor ratio. The incorporation of uniformly decorated nickel particles on CuS micro flowers increased electrochemically active sites leading to better ion diffusion kinetics. Further, the specific capacitance value of Ni–CuS (molar ratio of 0.6:1) reflected significant enhancement, more than three times (464.03 F/g at 2 A/g), than the pure CuS (132.89 F/g at 2 A/g) submicron flowers with excellent cyclic stability.

硫化铜纳米晶体（NCs）及其衍生物由于各种令人兴奋的物理特性而迅速引起研究人员的注意。这些性质可以通过改变形态和掺入合适的元素来进一步调整。在这里，我们报告了一种简单而简便的方法，用于合成分层的花形CuS，其中包含30-40 nm厚的纳米片和Ni-CuS纳米复合材料，且Ni与CuS的摩尔比不同。可以看出，CuS的分层花形的形成在很大程度上取决于硫源的类型以及金属与硫的前体比率。在CuS微花上掺入均匀装饰的镍颗粒会增加电化学活性位，从而导致更好的离子扩散动力学。此外，Ni-CuS的比电容值（摩尔比为0.6：