Hollow Nanostructured MoO₂ Electrode Materials for Supercapacitors

Hollow nanostructured MoO₂ was prepared via a facile solution route, in which Mo-peroxo sol was employed as the molybdenum source and ascorbic acid was used as the reductant. The as-obtained MoO₂ hollow nanostructures possess both hollow and porous structure feature, enables the significant increase of electrochemically active sites, which makes this hollow nanostructured MoO₂ electrode more electrochemically active when applied in supercapacitors. In three-electrode half-cell test, hollow nanostructured MoO₂ electrode can deliver a high specific capacitance of 159 F g^–1 when discharged at 1 A g^–1. Even at a large discharge current of 10 A g^–1, 121 F g^–1 can also be retained, manifesting its good rate performance. As anode electrode material, the lithium-ion storage capability of hollow nanostructured MoO₂ was also evaluated in this study.