Hybridization of Magnetic Fe₃O₄ with Mn-MOFs for High Performance Supercapacitor

Encapsulating guest compounds in metal–organic frameworks (MOFs) architectures is one of the most promising paths to achieve properties beyond those of the pristine MOFs and/or guest species. Contrary to the conventional host/guest composites encapsulating guest species inside MOF cavities, core–shell architectures exhibit a better accessibility to the pores ensuring an optimal diffusion of the substrate while presenting a unique structure that prevents the aggregation and the runoff of the active guests and ensures a tight interaction between core and shell, leading to synergistic effects. Herein, the integration of Fe3O4 with manganese-based MOF i.e., Fe₃O₄@Mn-MOF-NH₂ with varying shell thickness and hierarchical pore structure is synthesized. As a proof of concept, the obtained Fe₃O₄@Mn-MOF-NH₂ composite is used as an active material for supercapacitor applications which showed an enhancement of ~ 80% in specific capacitance with respect to pristine compounds.