| 초록 |
Molybdenum disulfide (MoS2) is a highly promising anode material for lithium-ion batteries because of its superior theoretical capacity and reasonable price. However, it exhibits poor electroconductivity and serious volume expansion, resulting in unsatisfactory electrochemical performance. In this study, we proposed a mix–bake–wash method to fabricate Fe3O4 nanoparticles embedded in hierarchical MoS2@3D porous carbon composites. The few-layered MoS2 not only provide advanced electrical conductivity, but also promote lithium ion diffusion, resulting in a reversible specific capacity of 939.6 mA h g-1 at 0.1 A g-1 and a superior rate capability (515.9 mA h g-1 at 5 A g-1). Furthermore, the Fe3O4 nanoparticles in composites offer improved specific capacity and effectively alleviate diffusion of lithium polysulfides during long-term cycling, showing remarkable cycling stability without apparent capacity fading (590 mA h g-1 at 2 A g-1 after 500 cycles). |
