Kavinkumar, ThangaveluThangaveluKavinkumarAyyaru, SivasankaranSivasankaranAyyaruAlagarasan, Jagadeesh KumarJagadeesh KumarAlagarasanRamaswamy, PriyankaPriyankaRamaswamyRosenkranz, AndreasAndreasRosenkranzWang, BoBoWangYu, JinhongJinhongYuSandoval-Hevia, GabrielaGabrielaSandoval-HeviaHevia, Samuel A.Samuel A.HeviaAkbari-Fakhrabadi, AliAliAkbari-Fakhrabadi2025-10-102025-10-1020252352152Xhttps://hdl.handle.net/20.500.12740/23375Developing high-performance supercapacitor electrodes with superior charge storage capacity, long-term stability, and high energy density is crucial for next-generation energy storage applications. In this study, a novel hybrid electrode material comprising reduced graphene oxide (RGO), Ti<inf>3</inf>C<inf>2</inf> MXene, and cobalt ferrite (CoFe<inf>2</inf>O<inf>4</inf>) nanoparticles was synthesized and evaluated for its electrochemical performance. The structural and morphological characterizations confirmed the successful integration of CoFe<inf>2</inf>O<inf>4</inf> onto Ti<inf>3</inf>C<inf>2</inf>, while RGO provided an enhanced conductivity and stability. Electrochemical investigations in a three-electrode system revealed a high specific capacitance of 1260 F g−1 at 1 A g−1 for the RGO/Ti<inf>3</inf>C<inf>2</inf>/CoFe<inf>2</inf>O<inf>4</inf> electrode, with an outstanding cyclic stability, retaining 89 % of its capacitance after 10,000 cycles. The superior super-capacitive performance was attributed to the synergistic interaction between RGO, Ti<inf>3</inf>C<inf>2</inf>, and CoFe<inf>2</inf>O<inf>4</inf>, which facilitated an improved charge transport and ion diffusion. A two-electrode asymmetric supercapacitor (RGO/Ti<inf>3</inf>C<inf>2</inf>/CoFe<inf>2</inf>O<inf>4</inf>/RGO) was fabricated, demonstrating a specific capacitance of 200 F g−1 at 1 A g−1 and maintaining 83 % capacitance retention after 10,000 cycles. The device achieved a maximum energy density of 80.36 W h kg−1 at a power density of 850 W kg−1, confirming its high energy storage capability. Moreover, the practical applicability of the device was validated by successfully powering an LED. Additionally, since the developed electrode materials exhibit magnetic characteristics, they hold potential for magnetic field-assisted energy storage applications. The excellent electrochemical properties, combined with structural stability and multifunctionality, highlight the RGO/Ti<inf>3</inf>C<inf>2</inf>/CoFe<inf>2</inf>O<inf>4</inf> composite as a promising candidate for advanced supercapacitor systems, paving the way for efficient, scalable, and sustainable energy storage technologies. © 2025 Elsevier B.V., All rights reserved.restrictedAccessCYCLIC STABILITYMAGNETIC FIELD-ASSISTED APPLICATIONSMAGNETIC NANOCOMPOSITEMXENESUPERCAPACITORHYBRID COMPOSITESCOBALT FERRITESELECTRODE MATERIALENERGY STORAGE APPLICATIONSHIGHER ENERGY DENSITYMAGNETIC FIELD-ASSISTED APPLICATIONMAGNETIC NANOCOMPOSITESMAGNETIC-FIELDREDUCED GRAPHENE OXIDESCAPACITOR STORAGEArtículo https://doi.org/10.1016/j.est.2025.116925