| 초록 |
Although, silicon (Si) is a promising high capacity anode material for Li-ion batteries (LIB), it suffers from rapid capacity fading due to excessively large volumetric expansion upon Li insertion. To address these issues, we introduce the novel electrode system of ternary nanocomposite consist of Si, Mn, and reduced graphene oxide (rGO), in which Si-Mn alloy offers high capacity characteristics and embedded rGO nanosheets confers steady cycleability. Si-Mn/rGO ternary nanocomposites were synthesized by mechanical complexation and subsequent thermal reduction of mixtures of Si nanoparticles, MnO2 nanorods, and rGO nanosheets. As a result, the ternary nanocomposite anodes exhibited a specific capacity of 600 mAh/g with ~ 90 % capacity retention after 50 cycles at a current density of 100 mA/g. The structural control of ternary nanocomposites by creating an ordered structure would be exploited to develop high capacity and long-life anode materials for versatile LIB applications. |
