Lithium-ion batteries with great energy capacity and power density have become an urgent demand due to the development of renewable energy sources and electric vehicles(EVs).Li-Si alloy is considered as one of the most attractive candidates for anode materials because of its high theoretical specific capacity(4200 mAh·g-1).However,the severe volume effect(> 300%)during the alloying/de-alloying process has largely limited its practical application.A common method to deal with such problem is embedding the active silicon material into the matrix,among which carbonaceous materials are most widely used one.