Exploring Energy Storage Capabilities: A Comparative Investigation of NiO and Co₃O₄ with Their Nanocomposite of NiCo₂O₄

This study highlights the successful synthesis of NiO, Co₃O₄, and NiCo₂O₄ nanoparticles through a cost-efficient process involving dextrose-assisted combustion followed by calcination treatment. Structural analysis revealed that NiO and Co₃O₄ have smaller crystallite sizes compared to NiCo₂O₄. The lower microstrain in NiO and Co₃O₄ suggests greater crystalline stability, while the higher microstrain in NiCo₂O₄ indicates internal stress in the crystal structure. The even distribution of elements in NiCo₂O₄ was confirmed by EDS and FTIR. Additionally, thermal analysis showed NiCo₂O₄ nanocomposite’s superior stability at high temperatures. NiCo₂O₄ exhibited a remarkable specific capacitance of 288 F g⁻¹ at 10 mV s⁻¹, surpassing other metal oxides. It also demonstrated extended discharge time and lower equivalent series resistance, highlighting its potential for advanced supercapacitor performance. This study provides a cost-effective blueprint for developing advanced binary metal oxide electrode materials, emphasizing the promising utility of synthesized NiCo₂O₄ nanoparticles in practical applications.