Advances in Structural Design of Silicon-Carbon Composites and Their Application in Lithium-Ion Batteries
With the rapid development of the new energy industry,the requirements for higher energy density of lithium-ion batteries are raised.Traditional graphite anode has approached its theoreticallimit,so silicon material with higher theoretical capacity,lower lithium potential and abundant reserves,become the ideal choice for the next generation of high-performance lithium-ion batteries.However,the large volume change of silicon material during alloying and its poor intrinsic electronic conductivity limits its further industrial application.The above problems can be effectively solved by combining with carbon materials with excellent electrical conductivity and good stability.Based on the reaction mechanism of silicon materials and the problems caused by volume expansion,this paper describes the performance advantages and research progress of silicon carbon composite materials,analyzes and compares the structural design strategies of coated,supported and dispersed silicon-carbon composites,and looks forward to the future application of silicon-carbon materials in terms of cost and manufacturability.
NETL
NSTL
万方数据
