Hierarchical Graphitic Carbon Nitride-Zeolitic Imidazolate Framework-67 Nanostructures Adorned on Calcium Molybdate Nanospheres for High-Performance Supercapacitor Applications

Complex composite nanomaterials have recently received attention because of their enhanced electrochemical performance compared to single-structured materials. In this study, we synthesized calcium molybdate (CaMoO4) particles with a spherical shape and conducted surface modification to fabricate composite heterostructures on the CaMoO4 backbone using a simple two-step hydrothermal technique. To test their electrochemical characteristics, the produced hierarchical heterostructures were used as an electrode material for supercapacitors, exhibiting a cycling efficiency of 94% after 5000 cycles, a specific capacitance of 586 C g-1 at a current density of 1 A g-1, and good reversibility. These results demonstrate that the development of hierarchical heterostructures can significantly improve the electrochemical properties of materials by creating well-defined interfaces, increasing the surface area, and promoting efficient charge transfer, making them highly attractive for various applications in the field of energy storage and conversion.

Automated summary

In this study, composite heterostructures were synthesized on calcium molybdate particles using a two-step hydrothermal technique, leading to enhanced electrochemical performance. The hierarchical heterostructures showed a cycling efficiency of 94% after 5000 cycles, a specific capacitance of 586 C g-1 at a current density of 1 A g-1, and good reversibility when used as electrode material for supercapacitors. These results highlight the potential of hierarchical heterostructures in improving materials' electrochemical properties for various energy storage and conversion applications.