Cobalt and Zinc Layered Double Hydroxides Grown on Copper Foam pre-Coated by Copper Oxide Nanorods as an Efficient Electrode Active Material for Fabrication of High Performance Supercapacitors
Paper ID : 1140-ICNS
Authors:
Saeed Shahrokhian *1, Mahdiyeh Shahi2, Farzaneh Hekmat3
1Department of Chemistry, Sharif University of Technology, tehran, Iran
2Chemistry department, Sharif university of technology, Tehran, Iran
3Department of Chemistry, Sharif University of Technology, Tehran, Iran
Abstract:
Fabricating efficient supercapacitors with high energy storage and acceptable stability plays a pivotal role in energy conversion-storage application, which can precipitate ubiquity as durable energy storage devices. In this regard, noble and porous layered double hydroxides (LDHs) of cobalt and zinc binder-free nanosheets were deposited on Cu2O nanorods grown on copper foam as the electrode active material. At first, nanorods of Cu(OH)2 were fabricated on copper foam. Subsequently, Cu(OH)2 nanorods were calcinated and converted to the Cu2O nanostructures. Finally, nanosheets of Co-Zn@LDH were deposited on prepared Cu2O nanorods. Nanostructures of Co-Zn LDH nanosheets rendered highly porous structures, which led to a high capacity and appropriate energy density. The modified Co-Zn LDH@Cu2O positive electrode presented a high energy density (11.47 Wh.cm-2) along with a notable capacity (54.28 C.cm-2). Finally, a symmetric supercapacitor is fabricated using the developed pseudocapacitive electrode that showed acceptable power and energy densities together with very good cycle stability and rate capability.
Keywords:
Layered double hydroxide; Copper oxide nanorods; nanosheets; Copper foam; Supercapacitor
Status : Abstract Accepted (Poster Presentation)