Atomic‐Scale Laminated Structure of O‐Doped WS₂ and Carbon Layers with Highly Enhanced Ion Transfer for Fast‐Charging Lithium‐Ion Batteries

Abstract WS₂ anode materials show huge potential for fast‐charging lithium‐ion batteries (LIBs) due to the naturally good 2D diffusion pathways but suffer from large Li⁺ diffusion barrier energy and poor intrinsic electrical conductivity. Here, a defect‐rich atomic‐scale laminated structure of WS₂ and C (D‐WS₂‐C) with O doping and enlarged interlayer distance from 0.62 to 1.06 nm of WS₂ is first fabricated, which is assembled into micron‐sized spheres to prepare WS₂/C composite microspheres. D‐WS₂‐C with maximized molecular layer contact area between WS₂ and carbon and large interlayer spacing greatly enhances the electrical conductivity of WS₂ and reduces Li‐ion diffusion energy barrier, confirmed by density functional theory calculations. Besides, the unique D‐WS₂‐C enables the formation of vast superfine W nanoparticles (1–2 nm) during the conversation reaction, resulting in the construction of a space charge zone on W surface. Based on these characteristics of D‐WS₂‐C, the prepared WS₂/C composite microspheres show superior fast‐charging capability with a high capacity of 647.8 mAh g⁻¹ at 20 C in half cells. For full cells, a high‐energy density of 100.9 Wh kg⁻¹ is achieved at a charge time of only 8.5 min at 5 C, representing the best fast‐charging performances in WS₂‐based anode materials to date.