Solvent‐Controlled Bitumen‐Based Carbon Coating Enabling High‐Performance MoO ₂ Anodes in Lithium‐Ion Batteries

Molybdenum dioxide (MoO 2 ), as a transition metal oxide, possesses advantages such as high specific capacity, ease of synthesis, and environmental friendliness, making it a popular choice for lithium‐ion battery anode materials. However, its application in lithium‐ion batteries is constrained by severe volume expansion and low electrical conductivity. This work utilized bitumen as a carbon source, leveraging its solubility characteristics in organic solvents of varying polarity to enhance the mechanical properties of the carbon coating layer, thereby preparing Hept‐MoO 2 NP electrodes nano‐indentation characterization revealed that the carbon coating exhibits a low Young's modulus, high fracture toughness and excellent elasticity, enhancing the overall structural stability of the anode material. Relaxation time distribution analysis of the AC impedance results further confirmed that the carbon coating effectively suppresses impedance increase during cycling, thereby improving cycling stability. After 100 cycles at a current density of 200 mA g −1 , the Hept‐MoO 2 NP electrode exhibited a reversible specific capacity of (742.3 ± 18.6) mAh g −1 , markedly outperforming unmodified solvent‐regulated carbon‐coated MoO 2 electrode materials. This study provides an effective strategy for designing high‐performance MoO 2 anode materials, offering significant reference value for enhancing the energy density and cycle life of lithium‐ion batteries.