Solution-Plasma-Mediated Synthesis of Si Nanoparticles for Anode Material of Lithium-Ion Batteries.

摘要: Silicon anodes have attracted considerable attention for their use in lithium-ion batteries because of extremely high theoretical capacity; however, they are prone to extensive volume expansion during lithiation, which causes disintegration and poor cycling stability. In this article, we two approaches address issue, by reducing the size Si particles nanoscale incorporating them into a carbon composite help modulate problems. We improve our previous work on solution-plasma-mediated synthesis nanoparticles (NPs) adjusting electrolyte medium mild buffer solutions rather than strong acids, successfully generating Si-NPs with <10 nm diameters. then combined these using MgO-template-assisted sol-gel combustion synthesis, afforded porous materials. Among preparations, material obtained from LiCl 0.2 M + H₃BO₃ 0.15 solution-based exhibited reversible capacity 537 mAh/g after 30 discharge/charge cycles at current rate 0.5 A/g. attribute increased decreased particle Si-NPs. These results clearly show applicability facile environmentally friendly solution-plasma technique producing as an anode batteries.