In this work, the coralline nickel molybdenum oxide and sulfide (Ni-Mo-O-S) composites were successfully synthesized by two-step hydrothermal method. The coralline structure has large specific surface area and enriched porosity, which makes the composites have excellent electrical conductivity. Furthermore, the synergistic effect of Ni and Mo elements and the addition of S²⁻ ions improved the electrical conductivity and electrochemical performance of Ni-Mo-O-S. The electrochemical performance of the prepared materials was evaluated in detail. Specifically, the Ni-Mo-O-S composites achieved a high specific capacity of 330.2 mA h/g (3714.4 F/g) at a current density of 1 A/g, even 317.5 mA h/g (3265.5 F/g) at 5 A/g, as well as showing good rate performance and improved cyclic stability (75% capacitance retention after 3000 cycles). The asymmetric supercapacitor device assembled from Ni-Mo-O-S as the cathode and active carbon as the anode had a high specific energy of 35 Wh/kg at a specific power of 903.2 W/kg, and possessed excellent long-term electrochemical cycling stability (95.2% capacitance retention after 10,000 cycles). These results indicate that our coralline composites provide a promising and feasible method for the development of supercapacitors.

通过两步水热法成功地合成了珊瑚线型氧化镍钼和硫化物（Ni-Mo-OS）复合材料。珊瑚线结构具有大的比表面积和丰富的孔隙率，这使得复合材料具有优异的导电性。此外，Ni和Mo元素的协同​​作用以及S ^2-的添加离子改善了Ni-Mo-OS的电导率和电化学性能。详细评估了所制备材料的电化学性能。具体地说，Ni-Mo-OS复合材料在1 A / g的电流密度下达到了330.2 mA h / g（3714.4 F / g）的高比容量，甚至在5℃下也达到了317.5 mA h / g（3265.5 F / g）。 A / g，并显示出良好的速率性能和改善的循环稳定性（3000次循环后的电容保持率为75％）。由Ni-Mo-OS作为阴极和活性炭作为阳极组装而成的非对称超级电容器装置在903.2 W / kg的比功率下具有35 Wh / kg的高比能，并且具有出色的长期电化学循环稳定性（ 10,000次循环后，电容保持率为95.2％）。