Flower-Like MoSe/MoO Composite with High Capacity and Long-Term Stability for Lithium-Ion Battery.

A simple method is developed for the preparation of MoSe/MoO composite with a flower-like structure for high-performance lithium-ion batteries (LIBs). MoSe could lead to fast and facile movement of Li due to its larger interlayer spacing. Meanwhile, MoO could protect the lamellar structure of MoSe from being destroyed in the charging/discharging processes to maintain the required active surface to electrolytes. In addition, the flower-like structure of the composite could effectively alleviate the volume expansion during charging/discharging. As LIBs are anode material, MoSe/MoO composite demonstrates an excellent specific discharge capacity of 1042 mAh g after 100 cycles at 0.1 A g, which is attributed to the synergistic effects of MoSe and MoO in the composite.