SILICON NEGATIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF

A silicon anode material and its preparation method and application, belonging to the field of secondary battery technology. The silicon anode material includes porous γ-lithium aluminate and a carbon coating layer. The pores of the porous γ-lithium aluminate are sequentially deposited with a carbon layer and a silicon material layer. The carbon coating layer coats the surface of the porous γ-lithium aluminate, which has been deposited with the carbon layer and the silicon material layer. The silicon anode material effectively prevents direct contact between the silicon material and the electrolyte, and inhibits the volume expansion of silicon during cycling from the material side. It effectively alleviates volume changes, making the structure of the electrode material more stable, thereby enhancing the electrochemical performance of the material.