Preparation of Fe3O4/carbon Composites on the Basis of Cellulose Microspheres and their Application as Anode Material for Lithium-ionBatteries

摘要

Fe3O4/carbon microspheres (Fe3O4/C) were prepared by a facile hydrothermal reaction using cellulose and ferric trichloride as precursors. The resultant composite spheres have been investigated as anode materials for the lithium-ion batteries, and they show high capacity and good cycle stability (830mAhg?1 at a current density of 0.1C up to 70 cycles), as well as enhanced rate capability. The excellent electrochemical performance is attributed to the high structural stability and high rate of ionic/electronic conduction arising from the porous character and the synergetic effect of the carbon coated Fe3O4 structure and conductive carbon coating.