Abstract
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 °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.
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Funding
We received financial support from the National Natural Science Foundation of China (Grant No. 21673064, 51902072 and 22109033), Heilongjiang Touyan Team (Grant No. HITTY-20190033), Fundamental Research Funds for the Central Universities (Grant No. HIT. NSRIF. 2019040 and 2019041), Heilongjiang Province “hundred million” project science and technology major special projects (2019ZX09A02), and State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) (Grant No. 2020 DX11), Heilongjiang, postdoctoral financial assistance (LBH-Z19055).
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Mu, J., Wu, B., Ding, F. et al. Preparation and electrochemical properties of natural spherical graphite materials coated with manganese chloride. Ionics 28, 3187–3195 (2022). https://doi.org/10.1007/s11581-022-04558-8
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DOI: https://doi.org/10.1007/s11581-022-04558-8