10th International Aerosol Conference
September 2 - September 7, 2018
America's Center Convention Complex
St. Louis, Missouri, USA

Abstract View


Fabrication of Iron Oxide Nanoparticles Deposited on Crumpled Graphene for Supercapacitor Applications

CHONGMIN LEE, Sun Kyung Kim, Ji-Hyuk Choi, Hankwon Chang, Hee Dong Jang, Korea University of Science and Technology

     Abstract Number: 368
     Working Group: Materials Synthesis

Abstract
Supercapacitors have attracted considerable attention in recent years because they are able to provide high power density, fast charge process, long cycle life, and low maintenance cost. The performance of supercapacitors is largely determined by the properties of the electrode materials. So far, there are mainly three kinds of electrode materials: carbonaceous materials, transition metal oxides and conducting polymer materials. Among them, transition metal oxides have been widely investigated as pseudocapacitor electrode materials owing to their potentially high specific capacitance. Recently, iron oxides have emerged as alternative electrode materials for supercapacitors because they have advantages of low cost, natural abundance, and environmental friendliness. Graphene loaded with hematite (Fe2O3) or magnetite (Fe3O4) exhibited enhanced specific capacitance as well as a high energy density. In this study, we present three-dimensional (3D) crumpled graphene (CGR) decorated with Fe2O3 and Fe3O4 nanoparticles to determine which one can exhibit higher electrochemical performance of supercapacitors. The 3D CGR-Fe2O3 and 3D CGR-Fe3O4 composites were synthesized in different gas atmospheres from a colloidal mixture of GO and from iron (III) chloride hexahydrate (FeCl3·6H2O), respectively, via one step aerosol spray pyrolysis. Sizes of both iron oxides nanoparticles were ranged from 5 to 10 nm when loaded onto 500 nm CGR. The electrochemical properties of the 3D CGR-Fe2O3 and 3D CGR-Fe3O4 composites were examined to compare the electrochemical performance of both composite electrodes. The 3D CGR-Fe3O4 composite electrode had 16% higher values of capacitance and electrical conductivity than those of the 3D CGR-Fe2O3 composite electrode.