Hydrothermal synthesis and electrochemical properties of α-MoO_3 nanobelts used as cathode materials for Li-ion batteries

摘要

Uniform α-MoO_3 nanobelts were successfully synthesized by the hydrothermal process at 180℃ for 20 h of the acidic solutions with different pH values of 0-0.75, adjusted using HC1 (cone). XRD and SEM results revealed that the pH of the precursor solutions played an important role in the phase, impurities, and morphology of the products. At the pH = 0, the perfect α-MoO_3 nanobelts with a few tens of microns long were synthesized. By the TEM characterization, orthorhombic MoO_3 has a distinctive layered structure along the [010] direction, consisting of distorted MoO_6 octahedrons connected by common corners along the [100] direction and common edges along the [001] direction. The electrochemical measurement showed that the α-MoO_3 nanobelts have high specific charge capacity.