Silicon/Silicon Carbide/Graphite Composite Anode Material for Rechargeable Lithium-Ion Batteries by High-Temperature Vacuum Adsorption Method

Abstract

Recently, the electrode materials for next-generation lithium-ion batteries (LIBs) draw widespread attention on storing reversibly the electrical energy. For this issue, the expanded graphite and silicon particles are chosen to generate silicon/silicon carbide/graphite composite anode material using a high-temperature vacuum adsorption method. The prepared composites are measured by X-ray diffraction, transmission electron microscopy, and Raman spectra, et al. The composites are cycled at a current density of 50 mA g-1, in order to observe their potential specific capacity. An initial charge capacity is 566.5 mAh g-1, and its initial Coulombic efficiency is 97.4 %. The reversible specific capacity keeps at 502 mAh g-1 after 80 cycles, displaying a capacity retention of 88.7%