One-Pot Synthesis of rGO@Cu 2 V 2 O 7 Nanocomposite as High Stabled Electrode for Symmetric Electrochemical Capacitors

Abstract

The rGO anchored copper vanadate nanostructures have been synthesized through facile hydrothermal synthesis for the high efficient energy storage applications. The prepared Cu 2 V 2 O 7 and rGO@Cu 2 V 2 O 7 nanostructures are fabricated as the electrode materials for three electrode and symmetric type electrochemical supercapacitors. Based on the electrochemical the electrodes shows the outstanding areal capacitance values of 340 and 545 F g −1 for Cu 2 V 2 O 7 and rGO@Cu 2 V 2 O 7 electrodes, respectively. Also the charge discharge curves of the rGO@Cu 2 V 2 O 7 electrode revealed the higher specific capacitance values of 520 F g −1 at 1 A g −1 which is higher capacitance value than Cu 2 V 2 O 7 electrode (318 F g −1 at 1 A g −1 ). Based on the cyclic performance the rGO@Cu 2 V 2 O 7 electrode enumerate 98.6% withstand even the 1000th cycle. The symmetric electrode based device have been shows the higher capacitance values of 190 F g −1 at 1 A g −1 for rGO@Cu 2 V 2 O 7 it is higher than pure Cu 2 V 2 O 7 (148 F g −1 at 1 A g −1 ). With the synergitic reaction of rGO@Cu 2 V 2 O 7 electrode shows the high energy 29.7 Wh kg −1 and power 4.8 kW kg −1 and the Cu 2 V 2 O 7 and rGO@Cu 2 V 2 O 7 electrodes. Also the rGO@Cu 2 V 2 O 7 symmetric electrode device shows the higher cyclic efficiency about 97.5% at the 2000th cycle. These findings assess the rGO@Cu 2 V 2 O 7 electrode is a promising candidate for the energy storage application.