Wrinkle-Shaped Nickel Sulfide Grown on Three-Dimensional Nickel Foam: A Binder-Free Electrode Designed for High-Performance Electrochemical Supercapacitor Applications

Recently, three-dimensional nickel foam (3D-Nf) has been increasingly studied; however, further modifications in nanoscale surface modification are necessary for particular applications. In this work, hierarchically porous nanogranular NiS (NiS-3D-Nf) and wrinkle-shaped (w-NiS-3D-Nf) structures were fabricated directly on by a simple one-step solvothermal process using two different solvents. Several characterization techniques, including X-ray diffraction pattern, photoelectron spectroscopy, scanning electron microscopy, used to characterize the samples’ properties. To prove their applicability, supercapacitor electrodes tested three-electrode assembly cell. The resulting w-NiS-3D-Nf exhibited greater capacitive activity than NiS-3D-Nf electrodes. optimized delivered an excellent specific capacitance of 770 Fg−1, at current density 1 Ag−1, compared with (162.0 Fg−1 @ Ag−1), cyclic stability over 92.67% retention after 2200 cycles. resultant unique structure integrated hierarchical configuration can not only enhance abundant accessible areas but also produce strong adhesion 3D-Nf, facilitating fast transportation ions electrons electrochemical reaction via conductive 3D-Nf. This set results suggests that 3D-Nf surfaces suitable solvent highly significant effects morphology, ultimately, performance. Additionally, preparation approach is worthwhile, thus offers great potential