表面活性剂对NiCo2S4纳米薄膜的电化学性能影响的研究

通过水热法在泡沫镍上成功制备了纳米结构的NiCo₂S₄薄膜, 主要包括前驱体制备及硫化过程。研究表明, 制备过程中添加不同种类的表面活性剂会对NiCo₂S₄薄膜的形貌、结构和电化学性能产生影响。添加表面活性剂后, NiCo₂S₄会自组装逐渐形成三维纳米片网状结构。在所有的NiCo₂S₄薄膜中, 添加SDS表面活性剂的薄膜表现出最高的比电容(在0.5 A/g电流密度下达到2893 F/g)、出色的倍率特性(在10 A/g电流密度下达到1890.6 F/g)和良好的循环稳定性(1000次循环后保持率为96.1%)。研究结果表明纳米网状的NiCo₂S₄是一种极具潜力的超级电容器电极材料。

Surfactant Dependence of Nanostructured NiCo2S4 Films on Ni Foam for Superior Electrochemical Performance

Nanostructured NiCo₂S₄ films on Ni foams were successfully synthesized through a facile method, involving hydrothermal growth of NiCo-precursor and subsequent sulfidation process of NiCo₂S₄. The influence of different surfactants were investigated, including morphology, phase structure and electrochemical performance of NiCo₂S₄ electrodes. With the addition of surfactants during the hydrothermal processes, the nanostructured NiCo₂S₄ self-organized and agglomerated into nanosheets, showing outstanding influence on the morphology by the surfactants. Among these electrodes, the NiCo₂S₄ electrode modified with SDS exhibited an optimal capacitance of 2893 F/g at 0.5 A/g, a superior rate capability of 1890.6 F/g even at 10 A/g, and good cycling stability of 96.1% over 1000 cycles. These results indicate that nanosheet NiCo₂S₄ would be promising electrode materials for supercapacitor applications.