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Herein, we develop a binder-free copper molybdate nanocone array with a prism-like morphology on nickel foam (Cu3Mo2O9 NCAs/Ni foam) using a single-step hydrothermal method. With an optimal growth time (10 h) under hydrothermal conditions, the prism-like Cu3Mo2O9 NCAs are uniformly decorated on Ni foam with good adhesion and crystallinity. The prepared Cu3Mo2O9 NCAs/Ni foam has been directly used as a binder-free electrode to examine its suitability as a positive electrode in hybrid supercapacitors. In an aqueous 1 M KOH electrolyte, the binder-free Cu3Mo2O9 NCAs/Ni foam showed battery-type behavior with a high areal capacity of 449.5 μAh cm–2 at a discharge current density of 2 mA cm–2 and also exhibited a good cycling stability. In addition, the pouch-type hybrid supercapacitor is assembled using the prism-like Cu3Mo2O9 NCAs/Ni foam as a positive electrode and the activated carbon as a negative electrode in a 1 M KOH electrolyte. The hybrid supercapacitor achieves a maximum cell potential of 1.6 V with ...

Using a simple electrochemical deposition (ECD) method, β-nickel hydroxide (β-Ni(OH)2) nanosheets (NSs) are facilely integrated on non-woven conductive textile substrate (NWCTs). The NWCTs with copper-plated polyethylenterephthalate (Cu/PET) fibers serves as a highly conductive and low-cost working substrate for the ECD method. With an aid of direct current voltage in the growth solution, the β-Ni(OH)2 NSs well adhere to NWCTs fibers with good uniformity. The surface morphology and crystallinity properties of the synthesized β-Ni(OH)2 NSs on NWCTs are characterized by various physicochemical techniques. Furthermore, the hierarchical β-Ni(OH)2 NSs on NWCTs reveal superior energy storage performance in 1 M KOH electrolyte solution as a binder-free electrode for pseudocapacitors. Compared to the conventional conductive foil-based electrode, the pseudocapacitive electrode in this work exhibit a relatively high electrochemical performance (specific capacitance of 2185.6 F g–1 at 5 A g–1) and stable capacitance...