COATING OF PRE-FORMED SILICON NANOPARTICLES WITH HYDROTHERMAL CARBON AS NOVEL ANODE MATERIALS FOR LITHIUM-ION BATTERIES

摘要

Spherically shaped Si@SiO_x/C nanocomposites have been obtained in one-step procedure using a simple and green methodology, hydrothermal carbonization of glucose in the presence of commercially available silicon nanoparticles, and tested electrochemically as anodes for lithium ion batteries. The resulting material with a typical core/shell structure, which was further modified by electrochemical in-situ generation of a passivated layer, shows a significantly improved lithium storage performance in terms of a highly reversible lithium storage capacity (～ 1100 mAhg~(-1)), excellent cycling performance and high rate capability, rendering it a promising candidate as an anode material in lithium-ion batteries [1].