Inducing energy storage: Bimetallic MOF-derived Co3O4/NiO nanocomposites for advanced electrochemical applications

Abstract

Multimetallic-based nanocomposites have arisen as highly capable functional materials, offering new horizons for applications in electrochemical energy storage. Among the platforms for synthesizing a diverse range of nanostructures incorporating metals, oxides, sulfides, and nitrides within a porous carbon matrix, metal–organic frameworks (MOFs) stand out as exceptional candidates. In this study, we successfully synthesized Co3O4/NiO nanocomposites from a Co/Ni MOF, employing a 2-mthylimidazole (2 MI) linker as a key component in the synthesis process. The resulting nanocomposites reveal a notable synergy of characteristics, including high crystallinity, retained morphologies, and adjustable textural features, all of which are validated through a comprehensive series of characterization analyses. Leveraging these distinct advantages, the primary objective of this research is to fabricate Co3O4/NiO nanocomposites derived from a bimetallic MOF, with a keen focus on harnessing their potential for electrochemical energy storage uses. Electrochemical analysis of the Co3O4/NiO nanocomposite reveals an exceptional capacitance of up to 180.4F/g at 0.2 A/g, demonstrating exceptional performance and robust stability over a notable 1200 cycles. Furthermore, the Co3O4/NiO nanocomposite exhibits remarkable electrocatalytic performance, achieving a utmost current density of 135.6 mA/cm2 at 0.6 V along with excellent long-term electrochemical stability. This remarkable capacitance and oxidation of methanol underscores the suitability of these nanocomposites for advanced electrochemical energy storage and fuel cell uses, emphasizing their potential for enriched performance in such systems.