Tuning the Electrochemical Properties of Transition Metal Oxide Anode based Material for Li-Ion Batteries

Abstract

This present work explores the development and electrochemical assessment of a ternary Fe3O4/NIO@HCSs: composite. This composite is synthesized through hydrothermal and thermal treatments to optimize the interface and microstructure of the materials. The unique combination of iron oxides (Fe3O4) and nickel oxide (NiO) with hollow carbon spheres (HCSs) aims to exploit the synergistic effects between these components. The HCSs Fe3O4/NiO composite achieves a remarkable initial discharge capacity of 1623 mAh/g. However, its most notable feature is its stability over prolonged cycling after 1000 cycles at a rate of 0.3C, the composite maintains a robust capacity of 520 mAh/g. In contrast, the pristine Fe3O4-NiO anode shows a substantial decline, with its capacity falling below 300 mAh/g at 0.3C. Additionally, impedance measurements reveal that Fe3O4/NiO@HCSs exhibit significantly lower impedance compared to pristine NiO, Fe3O4 and composite. This reduction in impedance is indicative of enhanced electronic conductivity and improved lithium-ion transport within the composite. The findings highlight the superior performance of Fe3O4/NiO@HCSs.