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MM: Fachverband Metall- und Materialphysik

MM 4: Materials for the Storage and Conversion of Energy I

MM 4.9: Talk

Monday, March 9, 2026, 12:45–13:00, SCH/A216

NiCo2O4/Fe3O4 Nanocomposite with a Sea Urchin-like Morphology as a High-Performance Dual-Functional Material for Advanced Lithium-Ion Batteries and Supercapacitors — •Amina Zafar, Amjad Nisar, and Mashkoor Ahmad — Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, Pakistan

The development of advanced electrode materials with multifunctional electrochemical properties is critical for next-generation energy storage systems. In this study, mesoporous sea urchin-like nickel cobaltite/magnetite (NiCo2O4/Fe3O4) composite was synthesized and systematically investigated for lithium-ion batteries and supercapacitors. The resulting composite offers high specific surface area, improved conductivity, abundant active sites and favorable structural characteristics. DFT calculations reveal that the composite exhibits enhanced redox kinetics and improved charge transfer compared to pristine NiCo2O4, leading to superior electrochemical performance. As an anode for lithium-ion batteries, the NiCo2O4/Fe3O4 electrode delivers a high reversible capacity of around 730 mAh/g at 0.3 A/g with excellent cycling stability, retaining 87.1 % of its capacity after 1000 cycles. For supercapacitor, the electrode exhibits an enhanced specific capacitance of 1330 F/g at 1 A/g, outperforming both NiCo2O4 and Fe3O4. The assembled (NiCo2O4/Fe3O4//activated carbon) device achieved a specific capacitance of 221 F/g and an energy density of 69.6 Wh/kg, along with excellent cycling stability, retaining around 94 % capacitance after 8000 cycles.

Keywords: Sea urchin-like NiCo2O4/Fe3O4 nanostructure; Redox activity; Synergistic effect; Specific capacitance; Energy density