聚乙烯吡咯烷酮静电喷雾制备锂电池负极材料OA

Silicon-based materials,as commonly used anode materials,possess an extremely high theoretical specific capacity but suffer from significant volume expansion and capacity fading during charge-discharge cycles.To achieve both high specific capacity and cycling stability of silicon materials,certain processing treatments are generally required for silicon-based materials.The experiment prepared polymer microspheres doped with nanosilicon particles using the electrospray method,and then obtained carbon-coated C/Si/SiO2 microspheres through high-temperature carbonization as the anode material for lithium-ion batteries.After 100 cycles at a current density of 0.2 A/g,the material exhibited a specific capacity of 644.8 mAh/g and a capacity retention rate of 81.4%,maintaining stability even at high current densities.The carbon coating significantly reduces the volumetric expansion of silicon particles and enhances the cycling stability of the silicon material.