Development of high-power electronic devices has accelerated the need for the fabrication of high-capacity lithium rechargeable batteries. As for anode electrodes, Silicon has been considered to serve as promising electrodes since they have high capacity (theoretical capacity of 980 關Ah/(cm2m)) compared to the current industry standard electrodes of carbon or graphite.1,2 Despite the high capacity, however, a pure Si electrode suffers from poor cyclability due to mechanical cracking caused by the volume change occurring during insertion and extraction processes. For the enhancement of performance, such as reversible capacity, the modification of the electrode structure seems to be a vital factor.3 Recently, the use of nanostructured materials in battery systems is suggested to be one of these possibilities since the physical, electrical and chemical properties of nanophases are very different from those of their bulk counterparts.4-6 In addition, the use of nanostructured elec trodes was shown to strongly affect the reversible capa city of batteries. For example, Li et al. demonstrated the advantage of nanometer-sized host materials for lithium insertion as an anode material for secondary lithium batteries.7 They proposed that the improved rate and cycling performance are related to the small domain size of the Sn grains within the nanofibers. However, an investigation of the relationship between the size and electronic properties of nanocomposite electrode in a battery system is not yet understood and further work is required.....