Preparation and electrochemical properties of natural spherical graphite materials coated with manganese chloride

Natural spherical graphite (NSG) is a common anode material with a wide range of applications in lithium-ion batteries (LIBs). In order to improve the electrochemical performance of NSG, this paper coated NSG with MnCl2 using the molten salt method. It was demonstrated that the formation of a cladding layer with internal pores on the surface can improve the charge/discharge capacity and rate performance of NSG@MnCl2, which is higher than those of NSG mixed with MnCl2 individually. The results indicate that the capacity of NSG@MnCl2 after a 4 h reaction time at 670 degrees C was 493.39 mAh g(-1) at a current density of 0.05 A g(-1), which was 109.04 mAh g(-1) higher compared to NSG. The capacity of NSG@MnCl2 was 153.38 mAh g(-1) at a current density of 2A g(-1), which was 128.92 mAh g(-1) higher than NSG.

Automated summary

In this study, NSG was coated with MnCl2 using the molten salt method to form a cladding layer with internal pores. The results demonstrate that this treatment method significantly improves the charge/discharge capacity and rate performance of NSG.