The composite of multiple metal materials is an effective means of improving the electrochemical performance of supercapacitors, however the synergistic effect of composites is currently facing challenges. In this work, the metal-organic framework was constructed by a simple solvent method to synthesize the Co-MOF and the CoS_x material was derived by sulfidation. Subsequently, Ni–Co–O nanosheets were deposited on the above structures by electrodeposition. The Ni–Co–O nanosheets were grown on the CoS_x surface to build cross-linked structures, while maintaining the structural stability, the conductivity and reaction site of the material are improved, and the ion transport is accelerated. The synergistic effect of both materials CoS_x and Ni–Co–O effectively improves the specific capacity of the material (899 C g⁻¹ at 1 A g⁻¹). In addition, the assembled asymmetric supercapacitors show a high energy density 42.43 kW kg⁻¹ at a power density of 0.725 kW h kg⁻¹ as well as an excellent cycle stability (83.73% capacity retention after 3000 cycles).

多种金属材料的复合材料是改善超级电容器电化学性能的有效手段，但是复合材料的协同作用目前面临挑战。在这项工作中，通过简单的溶剂方法构建了金属有机骨架以合成Co-MOF，并且通过硫化获得了CoS _x材料。随后，通过电沉积将Ni-Co-O纳米片沉积在上述结构上。Ni-Co-O纳米片生长在CoS _x表面上，以建立交联结构，同时保持结构稳定性，改善了材料的电导率和反应部位，并加速了离子迁移。两种材料CoS _x的协同效应和Ni-CO-O有效地提高了材料的（899 C g还比容量^-1 1 A G ^-1）。此外，组装的非对称超级电容器在0.725 kW h kg ^-1的功率密度下显示出高能量密度42.43 kW kg ^-1和出色的循环稳定性（3000次循环后的容量保持率为83.73％）。