有色设备

Replacing traditional graphite anodes with high-capacity silicon materials to improve the energy density of lithium-ion batteries is a current research hot spot. Due to the low conductivity of silicon anode and the serious volume expansion effect during lithium intercalation, the silicon anode has poor rate capability and unsatisfactory cycle performance, and it is difficult to achieve commercial application. The composite of metals with excellent electrical conductivity and silicon with high lithium storage capacity is regarded as one of the effective modification strategies. This article introduces the research progress of the structure design, synthesis method and electrochemical performance of silicon-metal-based anode materials, and discusses the improvement mechanism of lithium storage performance.