Synthesis and electrochemical behaviors of α-MoO₃ nanobelts/carbon nanotubes composites for lithium ion batteries

Abstract

α-MoO₃ nanobelts/carbon nanotubes (CNTs) composites were synthesized by simple hydrothermal method followed by CNTs incorporating, and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Cyclic voltammogram (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge testing techniques were employed to evaluate the electrochemical behaviors of α-MoO₃ nanobelts /CNTs composites. The results exhibited that compared to bare α-MoO₃ nanobelts, the α-MoO₃ nanobelts/CNTs composites have better electrochemical performances as cathode materials for lithium ion battery, maintaining a reversible specific capacity of 222.2 mAh/g at 0.3 C after 50 cycles, and 74.1% retention of the first reversible capacity. In addition, the Rct value of the α-MoO₃ nanobelts/ CNTs is 13 Ω, much lower than 66 Ω of the bare α-MoO₃ nanobelts. The better electrochemical performances of the α-MoO₃ nanobelts /CNTs composites can be attributed to the effects of the high conductive CNTs network.

Keywords

α-MoO₃ nanobelts / carbon nanotubes / composite / cycling performance / electrochemical impedance spectroscopy

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