| 초록 |
Sodium-ion batteries (SIBs) have attracted attention as alternatives to lithium-ion batteries (LIBs) because of the abundant resources of sodium. However, sodium ions have intrinsic problems such as larger size than lithium ions, which face the challenges for developing suitable electrode materials. In several studies about anode materials, Sn is considered as a promising candidate for anode material due to its high theoretical capacity and environmental friendliness. Nevertheless, huge volume expansion of Sn during cycling leads to continuous pulverization of active materials. In this study, Sn/carbon nanotube (CNT) composite as anode material is synthesized by a simply hydrothermal method. SnO2 particles were attached onto the surface of the CNT matrix, and these particles were reduced to Sn by heating treatment. The free-standing film anode was fabricated by vacuum filtration. This binder-free electrode exhibited high capacity of ~760 mA h g-1 at a current density of 100 mA g-1. |
