Magnetic Field‐Assisted Enhancement of Electrochemical Charge Storage Performance in GaFeO 3 Electrodes

The growing global need for renewable energy has created a strong demand for efficient technologies capable of capturing and storing clean energy effectively. A magneto‐capacitor is an energy storage device whose charge storage capability improves when exposed to a magnetic field, offering a promising way to enhance energy storage efficiency for future energy applications. Here, we have explored the impact of magnetic fields on supercapacitor performance by comparing behavior under zero‐field and applied‐field conditions. The sample was synthesized using a solid‐state method and characterized through XRD, FESEM, and FTIR analyses. From GCD, we achieved an approximately 53.08% enhancement in capacitance under an applied magnetic field of 1000 G. The enhancement arises from Lorentz‐force‐driven electrolyte transport and modified Nernst diffusion‐layer dynamics. The study further examines the contributions of magnetohydrodynamic effects, ion transport, pseudocapacitive reactions, and electrode–electrolyte interfacial kinetics. To demonstrate practical applicability, a flexible GFO//GFO symmetric micro‐supercapacitor (MSC) was fabricated using laser‐scribed graphene (LSG) and a CMC/KOH gel electrolyte. The device exhibited an areal capacitance of 3.2856 mF cm − 2 and retained nearly 80% capacitance after 10,000 cycles, while maintaining electrochemical functionality under bending. These findings highlight GFO‐based magnetoelectrodes as a promising platform for magnetic‐field‐assisted and flexible energy‐storage technologies.