| 초록 |
Lithium ion batteries have been studied for many years especially with an aim of improving cycle stability and high capacity. Earlier researches have shown that the theoretical capacity of silicon and iron oxide is, 4200mAh/g and 924mAh/g, respectively, compared with 372mAh/g for a conventional graphite. Electrospun carbon nanofibers can buffer the volume expansion of silicon and metal oxide during the lithium intercalation. Also, one-dimensional fibers provide pathways to charges. Thus, electrospun carbon nanofibers with silicon and iron oxide afford not only high theoretical capacity but also cycle retention and conductivity. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD) were adopted to characterize hybrid structures, and the results were discussed in relation to the anodic performance. |
