| 초록 |
Magnetite, Fe3O4, is a promising anode material for lithium ion battery due to its high theoretical capacity (924 mAh/g), comparatively high electrical conductivity, low cost and low toxicity. Its application in practical lithium-ion batteries, however, is still hindered by the poor cycling performance caused by the severe aggregation and huge volume change of Fe3O4 particles during conversion process. We reported here the synthesis and cycle performance of carbon-treated Fe3O4 nanoparticle(C/Fe3O4) as an anode for lithium ion battery. Fe3O4 nanoparticles were prepared by liquid interface reaction in an beaker-autoclave. C/Fe3O4 samples were prepared either by vapor deposition of carbon sources or encapsulation with graphene sheets. The structure and morphology of C/Fe3O4 were characterized by TGA/XRD/TEM/SEM. The electrochemical properties of C/Fe3O4 were tested in a half cell with lithium foil as the reference electrode. Cells were galvanostatically cycled at 0.01~3.0 V Li+/Li, and cyclic voltammograms(CVs) measurements were carried out at a scanning rate of 0.2 mV/s. |
