In the present paper, rGO was coated on Ni foams (NFs) by simple physical deposition and subsequent thermal reduction method. Then, Ni₃S₂/MoS₂ composites with different morphologies on the surface of rGO were fabricated via one-step hydrothermal route with different reaction time (18 h, 24 h, 30 h, 36 h and 42 h). It's found that the reaction time significantly affects the morphologies and electrochemical performance of the composites. As reaction time is 18 h and 24 h, Ni₃S₂/MoS₂ composites show two-dimensional nanosheet-like shape with 3D network structure. As reaction time increases continuously, one-dimensional nanorod with residual nanosheet at the root is obtained. After 36 h, hollow Ni₃S₂@MoS₂ hybrid nanofibers with hierarchical core-shell structure were fabricated. RGO/Ni₃S₂/MoS₂ composite with core-shell structure (prepared at 150 °C for 36 h) exhibited good electrochemical properties with specific capacitance of 6451 mF∙cm⁻² at 40 mA∙cm⁻², and a remarkable cycling performance of 87.2% capacitance retention after 5000 cycles at 110 mA cm⁻². An aqueous asymmetrical supercapacitor was assembled using rGO/Ni₃S₂/MoS₂ composite obtained at 150 °C for 36 h and rGO as positive and negative electrode materials. The assembled device displays very good cycling stability of 133% retention of initial specific capacitance and high energy density of 32.6 W h kg⁻¹ at a power density of 399.8 W kg⁻¹. These results sufficiently prove the practical application of rGO/Ni₃S₂/MoS₂ composites in supercapacitor electrode materials.

在本文中，通过简单的物理沉积和随后的热还原方法将rGO涂覆在镍泡沫（NFs）上。然后，通过一步水热法在不同的反应时间（18 h，24 h，30 h，36 h和42 h）下制备rGO表面不同形貌的Ni ₃ S ₂ / MoS ₂复合材料。发现反应时间显着影响复合材料的形貌和电化学性能。当反应时间为18 h和24 h时，Ni ₃ S ₂ / MoS ₂复合材料显示具有3D网络结构的二维纳米片状形状。随着反应时间的不断增加，获得了一维纳米棒，其根部残留有纳米片。36 h后，制备了具有分层核壳结构的空心Ni ₃ S ₂ @MoS ₂杂化纳米纤维。RGO /镍₃小号₂ / MOS ₂复合材料的核-壳结构（在150℃下制备的36小时）显示出与6451μF的∙厘米的比电容良好的电化学性能^-2在40mA∙厘米^-2，和显着的110 mA cm ^-2的5000个循环后的87.2％电容保持率的循环性能。使用在150°C下获得的rGO / Ni ₃ S ₂ / MoS ₂复合材料在36 h下将rGO / Ni ₃ S ₂ / MoS ₂复合材料和rGO作为正极和负极材料组装而成。组装后的器件在399.8 W kg ^-1的功率密度下显示出非常好的循环稳定性，可保持133％的初始比电容，并具有32.6 W h kg ^-1的高能量密度。这些结果充分证明了rGO / Ni ₃ S ₂ / MoS ₂复合材料在超级电容器电极材料中的实际应用。