Facile Synthesis of WS₂ Nanosheets–Carbon Composites Anodes for Sodium and Lithium Ion Batteries

Abstract WS₂ nanosheets–carbon composites (WS₂/C) were synthesized through a simple two‐step process including ball‐milling and sulfidation. When applied as anode materials for sodium‐ion batteries and lithium‐ion batteries, WS₂/C composites deliver a high reversible sodium storage capacity of 270 mA h g⁻¹ at 100 mA g⁻¹ and a high reversible lithium storage capacity of 322 mA h g⁻¹ at 200 mA g⁻¹ after 100 cycles. The improved electrochemical performance of WS₂/C compared with the bare WS₂ can be attributed to the synergic effects between WS₂ and Super P carbon black matrix, which can offer a beneficial conductivity environment for electron transfer and accommodate stress from the volume change during cycling.