| 초록 |
Silicon (Si) has gathered tremendous attention as a high-capacity anode material for Li-ion batteries (LIB); unfortunately, it suffers from poor capacitive stability owing to huge volume change and poor electrical conductivity when cycling. To overcome these drawbacks, we propose a ternary nanocomposite of Si/Ti2O3/rGO using ball milling and subsequent thermal reduction process. As a result, the obtained ternary nanocomposite exhibited a specific capacity of 985mAh/g and a coulombic efficiency of 98.4% after 100cycles at a current density of 0.1A/g. This superior electrochemical performance can be ascribed to the improved electron and ion transport provided by the Ti2O3 phase within the Si domains and the structurally reinforced conductive framework comprised of the rGO nanosheets. Therefore, it is expected that our approach can also be applied to other anode materials to enable large reversible capacity, excellent cyclic stability, and good rate capability for high-performance LIBs. |
