Ultrathin and large-sized vanadium oxide nanosheets mildly prepared at room temperature for high performance fiber-based supercapacitors

Abstract

Ultrathin vanadium oxide (V₂O₅) nanosheets with lateral sizes of up to tens of micrometers were synthesized, and then incorporated into multi-walled carbon nanotube (MWCNT) fibers. The solid-state supercapacitor based on such hybrid fibers exhibited an improved volumetric capacitance of 31 F cm⁻³ at 1.0 A cm⁻³, and a volumetric energy density of 2.1 mW h cm⁻³ at 1.5 W cm⁻³.