The Preparation And Electrochemical Performance Analysis of Different Porous Silicon Composites

In this work, LiAlH4 is used to reduce SiO2 to porous silicon, and then nano-silver (AgNPs) and Li2CO3 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 Li2CO3 (Si-Li2CO3). Si-Ag composites are suitable to be used as anode materials for lithium-ion batteries.

Laser-induced breakdown spectroscopy using a porous silicon substrate produced by metal-assisted etching: microanalysis of a strontium chloride aqueous solution as an example

The LIBS signal of the dry residue from a small amount of liquid sample is significantly enhanced by using a porous silicon substrate produced by gold-nanoparticle-assisted etching.