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

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 MoS2 and MoO3 to improve their cycling stability. It is interesting to note that the cycling stability of as-treated MoS2 and MoO3 was significantly improved. Although the reversible discharge capacity was slightly decreased, the capacity of the pretreated MoS2 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 MoO3 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.