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Summary: The rational strategy to design the well‐ordered morphology of the metal oxides with defective engineering and tailoring them into specific electrode fabrication can significantly improve their electrochemical properties for high‐performance energy storage systems. Herein, we adopted an effective strategy to introduce oxygen‐defect into the well‐ordered three‐dimensional flower‐like CoMoO4 nanoarchitecture. The Co‐Mo precursor leads to the introduction of oxygen‐defects into the CoMoO4 (rCMO) nanoarchitecture during the heat‐treatment under an oxygen‐controlled environment (argon). The oxygen‐defects in the material could facilitate abundant electroactive sites and intrinsically enhance the conductivity and supercapacitor performance. The oxygen‐defect CoMoO4 (rCMO) exhibits a specific capacity of 531 mAh g−1 at a current density of 1 A g−1 compared to the pristine CoMoO4 (CMO; ambient atmosphere) of 322 mAh g−1 under the same current density. Meanwhile, the fabricated hybrid supercapacitor (HSC) of rCMO//AC provides a maximum specific capacitance of 159 F g−1. Further, it distributes an energy density of 49.87 Wh kg−1 at the power density of 845.45 W kg−1 with an excellent cyclic life of ~91.03% over 10 000 cycles. [ABSTRACT FROM AUTHOR]

The rational design and construction of nanostructured materials have a great impact on the development of high-performance advanced electrode materials, which has attracted extensive attention to improve reliable and efficient energy storage devices. Herein, we report vertically aligned CoMoO 4 nanoflakes with interconnected network-like porous structures as Faradic battery-type electrode materials for the advancement of supercapacitors (SCs). The nanoarchitecture CoMoO 4 electrode materials were effectively fabricated through simple hydrothermal method and subsequent heat-treatment under different temperatures. Further, the effect of heat-treatment on the electrodes materials' structural, morphological, and electrochemical properties were investigated by utilizing various characterization techniques. The unique nanoarchitecture of the 400 °C heat-treated CoMoO 4 (CMO1) endows a facile pathway for the fast diffusion of the electrolyte ions and mass transfer reaction. Interestingly, the CMO1 (400 °C) electrode exhibits the specific capacity of 499 C g−1, which is higher than those of the CMO2 (500 °C) of 385 C g−1 and CMO3 (600 °C) of 260 C g−1, respectively. Furthermore, the hybrid supercapacitor (HSC) tailored with CMO1 as a positrode and activated carbon as a negatrode delivers a high specific capacitance of 102 F g−1 with excellent energy and power densities of 31.61 W h kg−1 and 19.29 kW kg−1, respectively. [ABSTRACT FROM AUTHOR]