Facial Strategy to Production of Pomegranate like Fe3O4 Nano Assembly Embedded 2D-Crumpled Porous Carbon Sheets for a High-Performance Supercapacitor

Abstract

Environmental global warming is a big crisis, due to copious development of industries and depletion of fossil fuels generate deteriorating environmental pollution and appalling economic crisis. Up to now, many materials were developed for electrochemical energy storage. Albeit, there are increasing unmet for developing new technologies for efficient, renewable energy sources based on sustainable storage devices. Herein, we firstly report a unique and facile method to convert agro bio-waste into a wealth economical material. Renewable waste garlic husk (Allium sativum) used for the synthesis of The Fe3O4 MNAs@2D-CCS composite (magnetic nano-assembly (MNAs), 2-dimensional crumpled carbon sheets). Most importantly, no harmful solvents were used, and no secondary waste was generated in the preparation of these nanophase composite materials. The XPS analysis and STEM-EDS line profile reveal the formation of the composite. The Fe3O4 MNAs@2D-CCS composite shows high surface area 687 m2 g-1 and a high specific capacitance of 840 F g-1 at a current density of 0.5 A g-1 and outstanding cycle stability with 90.1% retention of its initial specific capacitance after 2000 cycles, which is better than most of the reported Fe3O4 capacitors. It was found that the Fe3O4 MNAs@2D-CCS composite exhibit high specific capacitances and excellent cycle stability than those of pristine Fe3O4 and pure CCS. Thus, the eco-friendly, economically viable method stimulate a new door for the generation of waste to valuable materials for energy, catalysis, and environmental applications. Figure 1