Electrochemical presodiation promoting lithium storage performance of Mo-based anode materials

Abstract Stabilizing the layer structures of Mo-based anode materials is still a challenge for Li ion batteries. Herein, we proposed an electrochemical presodiation strategy for MoS 2 and MoO 3 to improve their cycling stability. It is interesting to note that the cycling stability of as-treated MoS 2 and MoO 3 was significantly improved. Although the reversible discharge capacity was slightly decreased, the capacity of the pretreated MoS 2 at 300 mA g −1 was retained at 345 mA h g −1 after 100 cycles while that of the pristine one decreased to 151 mA h g −1 . The capacity of the pretreated MoO 3 after 60 cycles was also improved from 275 mA h g −1 (the pristine one) to 460 mA h g −1 . The stabilizing effect was further verified by scanning electron microscope (SEM) analysis. Electrochemical presodiation here could be a promising modification strategy for Mo-based anode materials.