MoO3–x Nanowire Arrays As Stable and High-Capacity Anodes for Lithium Ion Batteries

Abstract

In this study, vertical nanowire arrays of MoO_3–x grown on metallic substrates with diameters of ∼90 nm show high-capacity retention of ∼630 mAhg^–1 for up to 20 cycles at 50 mAg^–1 current density. Particularly, they exhibit a capacity retention of ∼500 mAhg^–1 in the voltage window of 0.7–0.1 V, much higher than the theoretical capacity of graphite. In addition, 10 nm Si-coated MoO_3–x nanowire arrays have shown a capacity retention of ∼780 mAhg^–1, indicating that hybrid materials are the next generation materials for lithium ion batteries.