Coating of α-MoO3 on nitrogen-doped carbon nanotubes by electrodeposition as a high-performance cathode material for lithium-ion batteries

In this work, alpha-MoO3 nanoparticles are grown on the surface of nitrogen doped carbon nanotubes (N-CNTs) via a facile electrodeposition method. The morphology of as-prepared nanocomposite shows that the interconnected alpha-MoO3 nanoparticles are homogeneously distributed on the surface of N-CNTs. When investigated as a cathode material for lithium ion batteries, the nanocomposite reveals a high reversible discharge capacity of 250 mA h g(-1) at a current density of 30 mA g(-1), simultaneously with good cycling performance and excellent rate capability compared with pristine MoO3 powder. Kinetics of this process is investigated by electrochemical impedance spectroscopy to understand the difference in electrochemical performance and the interface properties between the alpha-MoO3/N-CNTs nanocomposite and pristine MoO3 powder electrode. The correlation between the unique structural features of alpha-MoO3/ N-CNTs nanocomposite and its excellent electrochemical performance is also discussed. The excellent performance makes the as-prepared alpha-MoO3/N-CNTs nanocomposite a promising cathode material for high-performance lithium ion batteries. (C) 2014 Elsevier B.V. All rights reserved.