Thursday, 2 June 2022: 16:00
West Meeting Room 213 (Vancouver Convention Center)
The development of clean, sustainable and zero-carbon emission energy conversion and storage technologies has become an urgent demand to cope with the technological advancements. In this regard, Metal Organic Frameworks (MOFs) have emerged as outstanding materials for supercapacitors due to their high porosity, diverse structures and their ability to host other active species within its cages and prevent its dissolution. Herein, we report on a facile one pot synthesis of zeolitic imidazolate framework encapsulated polyoxometalates (POM@ZIF-67). The morphological and structural properties of the as synthesized materials were investigated via FESEM, EDS, XRD and FTIR techniques. Moreover, N2 adsorption/ desorption isotherms and XPS measurements were carried out to elucidate the textural properties and composition of the fabricated materials. Upon their use as supercapacitor electrodes, the POM@ZIF-67 electrode exhibited a maximum specific capacitance of 475 F g-1 at 2 A g-1. Furthermore, a supercapacitor device was constructed using activated carbon as the negative electrode and POM@ZIF-67 as the positive electrode, delivering energy density and power density of 20.9 Wh kg-1 and 702 W kg-1, respectively. Furthermore, the device demonstrates an excellent long term stability and high Columbic efficiency over 5000 charging/discharging cycles at 5 A g-1.