Facile synthesis of platelet‐like zirconium tungstate nanostructures for high‐performance supercapacitors
Elaiyappillai Elanthamilan, Srinivasan Rajkumar, Sea‐Fue Wang, J. Princy Merlin
Abstract
Summary Increasing demand for electronic devices has sparked quantum of research work on energy storage systems. In the present work, we report the facile synthesis of platelet‐like Zirconium tungstate (ZrW 2 O 8 NPs) binary metal oxide via co‐precipitation method. The ZrW 2 O 8 NPs was confirmed by several physicochemical techniques. Furthermore, FESEM images proved the platelet‐like morphology of ZrW 2 O 8 NPs. The as‐prepared ZrW 2 O 8 NPs was used as electrode material in the fabrication of supercapacitors. ZrW 2 O 8 NPs @ Ni foil shows the specific capacitance (C sp ) maximum of 508 F g −1 at 5 mV/s and showed 91.3% of cyclic stability after 4000 GCD cycles. As a result, ZrW 2 O 8 NPs was utilized as an anode electrode material to construct an asymmetric device, ZrW 2 O 8 NPs || Activated carbon (AC). The as‐fabricated device showed the energy density of 9.65 Wh kg −1 related to the power density of 299.48 W kg −1 . The effective supercapacitive behavior might be due to the unique morphological features, occurrence of multiple redox sites, and enhanced electrical conductivity of ZrW 2 O 8 NPs. Thus, all these findings account for the applicability of ZrW 2 O 8 NPs as electrode material in high‐performance supercapacitors.