Eutectoid W_xC embedded WS₂ nanosheets as a hybrid composite anode for lithium-ion batteries

A novel eutectoid structure, W_xC-embedded WS₂ nanosheets hybrids composite, was developed by hydrothermal reaction followed by a carbonization process. The fabricated WS₂–W_xC hybrid nanosheets electrode was used for lithium-ion batteries as an anode material, and demonstrated the specific capacity of 272 mA h·g⁻¹ at 0.01 A g⁻¹ with enhanced rate competence and cycling behavior when compared with individual WS₂ and W₂C electrode. While the large interlayer spacing in WS₂ facilitates rapid Li⁺ transport, the extremely high electronic conductivity of W_xC provides a highly conductive electron transfer pathway, which facilitates fast and reversible (de)lithiation reactions during charging and discharging. Further, these outcomes point the way for developing future eutectoid hybrid systems for advanced energy-storage applications.