Elucidating the Optimization of Hkust-Mof/Pani as Redox Active Material for Battery-Supercapacitor Hybrids

Abstract

Metal-organic-frameworks (MOFs) emerges as a unique classification of porous materials widely favored for numerous applications. Therefore, MOFs are grabbing the immense interest to be investigated for energy storage domain. Herein, we have synthesized Cu-based HKUST-1 MOF and HKUST-MOF-PANI composite and explored its intrinsic electrochemical characteristics. The structural, elemental, and morphological analysis was done through X-ray diffraction, scanning electron microscopy, and EDX, followed by electrochemically analyzing the material through basic electrochemical analysis such as cyclic voltammetry, electro-impedance spectroscopy, and galvanostatic charge-discharge analysis. A supercapattery device was fabricated as HKUST-MOF-PANI//Activated carbon which displayed an energy density of 64 Wh kg-1 and 7200 W kg-1 power density. Furthermore, a simulation approach was adapted to apply Dunn’s model on our system that distinguished between capacitive and diffusive controlled processes. The compelling outcomes of the fabricated supercapattery device uplifts it for advance energy storage applications.

Keywords: batteries, electrode materials, MOF, supercapattery, Supercapacitors