The Preparation And Electrochemical Performance Analysis of Different Porous Silicon Composites

In this work, LiAlH 4 is used to reduce SiO 2 to porous silicon, and then nano-silver (AgNPs) and Li 2 CO 3 are attached to porous silicon substrate to form different porous silicon composites. X-ray diffraction (XRD) and scanning electron microscopy (SEM) are applied to characterize the morphology of porous silicon composites, and porous silicon composites are tested via electrochemical techniques. The experimental results present that porous silicon composites loaded with AgNPs (Si-Ag) show higher specific capacity (476.0195 mA·h·g -1 ) and lower interfacial impedance compared with composites loaded with Li 2 CO 3 (Si-Li 2 CO 3 ). Si-Ag composites are suitable to be used as anode materials for lithium-ion batteries.