|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High-Temperature Systems for Energy Conversion and Storage
||L-1: Graphene-inorganic Hybrids with Cobalt Oxides for Electrochemical Energy Storage and Conversion Applications
||S. Carrizosa, B. McDonald, Sanju Gupta
|On-Site Speaker (Planned)
We investigate the surface and electrochemical properties of hybrids from graphene (supercapacitive) and cobalt oxide (pseudocapacitive) polymorphs i.e. cobalt(II) monoxide; CoO and cobaltosic(II,III) oxide; Co3O4 as high-performance and relatively high-temperature electrochemical electrodes for alternative clean energy. We synthesized CoO, Co3O4 and Co nanoparticle on graphene oxide (GO) and reduced GO (rGO) that afforded chemical adsorption with enhanced coupling between cobalt and graphenes leading to higher surface reactivity by creating tailored interfaces. We employed complementary analytical techniques include electron microscopy combined with electron diffraction, x-ray diffraction, atomic force microscopy, electrical properties, and resonance Raman spectroscopy and mapping, revealing surface morphology, local and average structure and local charge transfer highlighting surface/interface. Electrochemical properties of these hybrids are evaluated as supercapacitors/pseudocapacitor cathodes and as Li-ion battery anodes displaying superior performance with high capacity, rate capability and cyclic stability. The present findings are also indicative of grade-quality of the hybrids as advanced electrocatalytical platforms.
||Planned: A print-only volume