Chen, XinLi, HuiXu, JianzhouJaber, FadiMusharavati, FarayiZalnezhad, ErfanBae, S.Hui, Kwan SanHui, Kwun NamLiu, Junxing2021-04-192021-04-192020-06-30Nanomaterials 10 (7): 1292 (2020)https://hdl.handle.net/20.500.12588/500In this study, we synthesized binder-free NiCo2O4@NiCo2O4 nanostructured materials on nickel foam (NF) by combined hydrothermal and cyclic voltammetry deposition techniques followed by calcination at 350 ◦C to attain high-performance supercapacitors. The hierarchical porous NiCo2O4@NiCo2O4 structure, facilitating faster mass transport, exhibited good cycling stability of 83.6% after 5000 cycles and outstanding specific capacitance of 1398.73 F g(-1) at the current density of 2 A·g(−1), signifying its potential for energy storage applications. A solid-state supercapacitor was fabricated with the NiCo2O4@NiCo2O4 on NF as the positive electrode and the active carbon (AC) was deposited on NF as the negative electrode, delivering a high energy density of 46.46 Wh kg(-1) at the power density of 269.77 W kg(-1). This outstanding performance was attributed to its layered morphological characteristics. This study explored the potential application of cyclic voltammetry depositions in preparing binder-free NiCo2O4@NiCo2O4 materials with more uniform architecture for energy storage, in contrast to the traditional galvanostatic deposition methods.Attribution 4.0 United Stateshttps://creativecommons.org/licenses/by/4.0/supercapacitorselectrodepositionNiCo2O4nanostructureArticle2021-04-19