Replacing fuel vehicles with electric vehicles is the best choice to solve urban environmental pollution, and lithium-ion power batteries have attracted widespread attention from researchers. In order to meet the requirements of electric vehicles for on-board ion power batteries, the development of negative electrode materials with high safety, good rate performance, and long service life is a hot and difficult topic.

　　Commercial lithium-ion batteries mainly use carbon materials as the negative electrode, but lithium batteries using carbon as the negative electrode still have some drawbacks in application:

　　1. During overcharging, lithium dendrites are prone to precipitate, causing battery short circuits and affecting the safety performance of lithium batteries;

　　2. Easy to form SEI film, resulting in low initial charging and discharging efficiency and large irreversible capacity;

　　3. The platform voltage of carbon materials is relatively low (close to metallic lithium), and it is easy to cause electrolyte decomposition, thereby posing safety hazards.

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