Anthracite‐Derived Porous Carbon@MoS2 Heterostructure for Elevated Lithium Storage Regulated by the Middle TiO2 Layer

Abstract The rational design of MoS 2 /carbon composites have been widely used to improve the lithium storage capability. However, their deep applications remain a big challenge due to the slow electrochemical reaction kinetics of MoS 2 and weak bonding between MoS 2 and carbon substrates. In this work, anthracite‐derived porous carbon (APC) is sequential coated by TiO 2 nanoparticles and MoS 2 nanosheets via a chemical activation and two‐step hydrothermal method, forming the unique APC@TiO 2 @MoS 2 ternary composite. The dynamic analysis, in‐situ electrochemical impedance spectroscopy as well as theoretical calculation together demonstrate that this innovative design effectively improves the ion/electron transport behavior and alleviates the large volume expansion during cycles. Furthermore, the introduction of middle TiO 2 layer in the composite significantly strengthens the mechanical stability of the entire electrode. As expected, the as‐prepared APC@TiO 2 @MoS 2 anode displays a high lithium storage capacity with a reversible capacity of 655.8 mAh g −1 after 150 cycles at 200 mA g −1 , and robust cycle stability. Impressively, even at a high current density of 2 A g −1 , the electrode maintains a superior reversible capacity of 597.7 mAh g −1 after 1100 cycles. This design highlights a feasibility for the development of low‐cost anthracite‐derived porous carbon‐based electrodes.