Barazandeh Mohammad, Kazemi Sayed Habib
Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 45137-66731, Zanjan, Iran.
Sci Rep. 2022 Mar 17;12(1):4628. doi: 10.1038/s41598-022-08691-2.
In the present work, we report the successful fabrication of dandelion-like Nickel-Cobalt Sulfide@Polypyrrole microspheres through the hydrothermal method and its possible application as a binder-free electrode in supercapacitors. This electrode exhibited low charge transfer resistance with a remarkable specific capacitance of 2554.9 F g at 2.54 A g, in addition to considerable cycle life stability. Also, an asymmetric device was prepared using NiCoS@PPy/NF as positive and rGO/NF as negative electrodes. This asymmetric supercapacitor exhibited a specific capacitance of 98.9 F g at 1.84 A g and delivered an energy density of 35.17 Wh kg at a power density of 1472 W kg. Such a remarkable performance can be originated from the synergy effect of NiCoS and PPy and the direct deposition of the composite on the current collector. Our findings suggest the dandelion-like NiCoS@PPy as a promising material for making high-performance supercapacitors.
在本工作中，我们报道了通过水热法成功制备出蒲公英状的硫化镍钴@聚吡咯微球及其作为超级电容器中无粘结剂电极的潜在应用。该电极表现出低电荷转移电阻，在2.54 A g时具有2554.9 F g的显著比电容，此外还具有相当的循环寿命稳定性。此外，使用NiCoS@PPy/NF作为正极和rGO/NF作为负极制备了一种不对称器件。这种不对称超级电容器在1.84 A g时表现出98.9 F g的比电容，在1472 W kg的功率密度下提供了35.17 Wh kg的能量密度。如此卓越的性能可源于NiCoS和PPy的协同效应以及复合材料在集流体上的直接沉积。我们的研究结果表明，蒲公英状的NiCoS@PPy是制备高性能超级电容器的一种有前途的材料。
