Superior magnetocapacitance in ferro/ferrimagnetic Fe3O4/Fe/Fe3C integrated N-doped carbon hybrid nanostructures under mild magnetic fields

Encapsulating magnetic materials in a carbon network increased the interfacial area, enhancing storage performance under a magnetic field. This led to a specific capacitance of 2057.3 F g −1 at 6 mT and 1.5 A g −1 .