首页|(163006)A comprehensive study on rational design of Cu decorated Fe_3O_4@ CeOHCO_3 with enhanced capacitance in supercapacitor applications
(163006)A comprehensive study on rational design of Cu decorated Fe_3O_4@ CeOHCO_3 with enhanced capacitance in supercapacitor applications
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NSTL
Elsevier
In this work, a novel Cu decorated Fe_3O_4@ CeOHCO_3 nanocomposite (Cu-Fe_3O_4@CeOHCO_3) has been prepared by a one-step hydrothermal method. Fabricating into the electrode, the electrochemical properties of the prepared materials were characterized by cyclic voltammetry (CV), galvano-static charge-discharge (GCD) test and electrochemical impedance spectroscopy (EIS). The specific capacitance of the Cu-Fe_3O_4@ CeOHCO_3 electrode was 324.7 F g~(-1) at a current density of 1.0 A g~(-1) with a capacitive retention of 88.3% after 1000 charge-discharge cycles. The assembled asymmetric supercapacitor(ASC) device can provide an energy density of 35.4 W h kg~(-1) with a high power density of 781.9 W kg~(-1). DFT calculations prove that the surface modification of Cu functions significantly in modulating the electronic structure and super-capacitive properties of CeOHCO_3. Our self-assembled Cerium-based composite may initiate the suitability for energy storage devices and provides a valuable reference for the fabrication in sodium Ion supercapacitors.
Metal oxide compositeMOFElectrode materialsSupercapacitorDFT
Hai Wang、Xingping Xu、Anne Neville
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College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao 266555, China
Institute of Functional Surfaces, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom