1D Layered LiVO 3 Nanorods Synthesized by Ultrasonic‐Assisted Chemical Route for Supercapacitor Applications

Herein, 1D layered lithium vanadate (LiVO 3 ) nanorods are successfully synthesized using a facile ultrasonic‐assisted chemical route using V 2 O 5 as the starting material. The as‐prepared LiVO 3 nanorods are characterized by X‐ray diffraction, X‐ray photoelectron spectroscopy, and field emission scanning electron microscopy techniques. The reaction and growth mechanism of LiVO 3 nanorods formation are provided. The synthesized LiVO 3 nanorods are used as electrode material for supercapacitor applications and exhibit a high specific capacitance of 426.2 F g −1 at 0.5 A g −1 . Additionally, the LiVO 3 // AC asymmetric coin cell supercapacitor device fabricated with LiVO 3 as the cathode shows an excellent energy density of 25.4 Wh kg −1 at a power density of 228.5 Wkg −1 along with superior cyclic stability of ≈80% after 5000 cycles and wide operating voltage window of 1.6 V. Density functional theory studies show that the decrease in the bandgap of the LiVO 3 is one of the intrinsic reasons that the conductivity and capacitive charge storage performance are greatly improved over V 2 O 5 . This design of a 1D layered LiVO 3 nanorods presented in this work will provide a path to discover high performing electrode materials for supercapacitor applications.