Preparation of MoS2/fungus carbon composite and its lithium-ions storage performance

Abstract

MoS₂ exhibits a large layer spacing and weak van der Waals forces between its layers, which facilitate the diffusion of lithium ions. As a typical embedded and de-embedded lithium-ions batteries (LIBs) anode material, MoS₂ boasts a high theoretical specific capacity, but its undergoes significant structural changes during repeated charging and discharging cycles, leading to rapid capacity degradation. In this study, MoS₂/fungus carbon (FC) composites with multilayer graded structures were prepared using biomass fungus. The fungus polysaccharide solution provides amorphous carbon to mantain the layer spacing of MoS₂ during the hydrothermal process. As a result, the discharge capacity of MoS₂/FC composites reached up to 1067.5 mA h g⁻¹ and 728.6 mA h g⁻¹ at current density of 0.2 A g⁻¹ and 2.0 A g⁻¹, respectively. More importantly, the composites demonstrates excellent long-term performance due to its unique multilayer graded N-doped carbon structure.