Synthesis, Magnetic and Electrochemical Properties of NiFe₂O₄-rGO Nanohybrids

In this paper, nickel ferrite (NiFe₂O₄)-reduced graphene oxide (rGO) nanohybrids were synthesized via a hydrothermal strategy successfully. The morphology and phase composition of as-prepared products were analyzed by field-emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The results show that the well-crystalized NiFe₂O₄ nano octahedrons with edge of 100 nm grew on the surface of rGO successfully. The magnetic property of the synthesized nanohybrids at room temperature was characterized by a vibrating sample magnetometer (VSM). The result shows that the nanohybrids have high saturation magnetization of 76.8 emu‧g⁻¹ and present a superparamagnetic property. The electrochemical property of the obtained nanohybrids was characterized by an Eight-channel battery tester through using the nanohybrids as the lithium-ion battery cathode material. It is found that the obtained nanohybrids have an initial discharge capacity and charge capacity of 1469 and 652 mA h·g⁻¹ respectively when the discharge—charge rate is 0.1 C.