In situ synthesis and electrochemical performance of MoO nanobelts as anode materials for lithium-ion batteries.

MoO nanobelts with different concentrations of oxygen vacancies were synthesized by a one-step hydrothermal process. XPS test results show that oxygen vacancies are distributed from the exterior to the interior of the MoO nanobelts. As an anode material for lithium-ion batteries, MoO-10 releases excellent rate capacitance. It can maintain a high specific capacitance of about 500 mA h·g at a high current density of 1000 mA·g. In the aspect of cycling stability, MoO-10 can retain a high specific capacity of 641 mA h·g after cycling for 50 times at 100 mA·g and 420 mA h·g after cycling for 100 times at 500 mA·g. The coexistence of oxygen vacancies and low-valence Mo ions is conducive to the intercalation/de-intercalation of Li ions and to promoting redox reactions. It has been proved to be a significantly effective way in which oxygen vacancies can improve the integrated performance of MoO nanobelts as anode materials.