▎ 摘　　要

This paper reports the fabrication and characterization of lithium ion batteries using Fe3O4/Fe-Go and Fe3O4/Go nanocomposites as positive and negative electrodes, respectively. The prepared nanocomposites were examined in detail by several techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The fabricated lithium-ion batteries were tested for charge and discharge in the voltage range of 0.05 V-2.8 V with the current density of 100 mA.g(-1). The first cycle of charging and discharging of a lithium ion battery was examined and observed specific capacities were of 835.7 mAh.g(-1) and 734.7 mAh.g(-1), respectively for both the composites. The Coulomb efficiency was 68.7% and 62.6%, respectively. The 20th cycle of charging and discharging of the lithium ion battery was performed and the observed specific capacities were 378.3 mAh.g(-1) and 317.2 mAh.g(-1), respectively for both the samples. The reversible capacity retention rates were 45.2% and 43.1%, respectively. Through simulation analysis, it was confirmed that the convective heat transfer coefficient of the battery surface can suppress the surface temperature of the battery. Thermal analysis of the battery cells was extended to the battery pack. Further, it was observed that the changes in the material of the battery shell influence the heat dissipation of the battery. However, as the convective heat transfer coefficient increases, the influence of the outer shell material on the heat dissipation of the battery was reduced.