In this paper, a sphere-like MoS₂ and porous TiO₂ composite film was prepared on Ti foil by plasma electrolytic oxidation and magnetron sputtering methods. The prepared film was assembled as a binder-free anode in the lithium-ion battery and a Li foil served as the counter electrode. The specific capacity and cycling stability of the electrode were evaluated, together with the cyclic voltammograms and electrochemical impedance spectra. The TiO₂/MoS₂ composite film anode combined the advantages of TiO₂ with high structural stability and MoS₂ with high theoretical capacity. The electrochemical performance exhibited a specific capacity above 400 mAh g⁻¹ at the current density of 100 µA cm⁻², which was much higher than that of the TiO₂ anode. Besides, after cycling under a high current density of 1000 μA cm⁻², the capacity came back to 91% of the initial capacity, showing a good rate capability. The porous TiO₂ prepared by plasma electrolytic oxidation can provide a significant number of internal channels for the Li⁺ diffusion, resulting in a high porosity of 33.5–41.6%, and a high Li⁺ diffusion coefficient of 3.12 × 10⁻¹⁴–6.67 × 10⁻¹⁴ cm²/s, which was beneficial for the enhanced electrochemical performance.

本文采用等离子电解氧化和磁控溅射法在钛箔上制备了球形MoS ₂和多孔TiO ₂复合薄膜。将制备的薄膜组装为锂离子电池中的无粘合剂负极，锂箔作为对电极。评估了电极的比容量和循环稳定性，以及循环伏安图和电化学阻抗谱。TiO ₂ /MoS ₂复合膜负极结合了TiO ₂结构稳定性高和MoS ₂理论容量高的优点。电化学性能表现出高于 400 mAh g ^-1的比容量在 100 µA cm ^-2的电流密度下，远高于 TiO ₂阳极的电流密度。此外，在1000 μA cm ^-2的高电流密度下循环后，容量恢复到初始容量的91%，显示出良好的倍率性能。通过等离子体电解氧化制备的多孔TiO ₂可以为Li ⁺扩散提供大量的内部通道，导致33.5-41.6%的高孔隙率和3.12 × 10 ^-14 -6.67 ×的高Li ⁺扩散系数10 ^-14 cm ² /s，有利于提高电化学性能。