Dual‐functional and polydopamine‐coated vanadium disulfide for “fast‐charging” lithium‐ion batteries

• DOI: 10.1002/bte2.20240001
• Publication Date: 2024-05-08T01:54:01Z
• Authors: Lu Wang; Hao Dang; Tianqi He; Rui Liu; Rui Wang; Fen Ran
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract As a typical representative of vanadium‐based sulfides, vanadium disulfide has attracted the attention researchers ascribed to its high theoretical capacity and unique crystal structure. However, overcoming structural collapse while achieving dual functionalization that serves as both active material binder remains challenging. This study designs dopamine‐coating core‐shell structure through synergistic effect V‐O bonds hydrogen between dopamine, which is further employed dual‐function electrode material. The polydopamine‐coated without exhibits specific 682.03 mAh g −1 , Coulombic efficiency 99.78% at current density 200 mA after 400 cycles. More importantly, larger 1000 385.44 1500 After 3150 cycles, 200.32 2000 . Electrochemical kinetics analysis displays fast ion‐diffusion kinetics, with order magnitude coefficients ranging from 10 −11 −12 kind potential be significantly promising for “fast‐charging” lithium‐ion batteries.