• 文献标题:   Europium oxide nanorod-reduced graphene oxide nanocomposites towards supercapacitors
  • 文献类型:   Article
  • 作  者:   ARYANRAD P, NADERI HR, KOHAN E, GANJALI MR, BAGHERNEJAD M, DEZFULI AS
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:  
  • 通讯作者地址:   Iran Univ Med Sci IUMS
  • 被引频次:   3
  • DOI:   10.1039/c9ra11012g
  • 出版年:   2020

▎ 摘  要

Fast charge/discharge cycles are necessary for supercapacitors applied in vehicles including, buses, cars and elevators. Nanocomposites of graphene oxide with lanthanide oxides show better supercapacitive performance in comparison to any of them alone. Herein, Eu2O3 nanorods (EuNRs) were prepared through the hydrothermal method and anchored onto the surface of reduced graphene oxide (RGO) by utilizing a sonochemical procedure (in an ultrasonic bath) through a self-assembly methodology. The morphologies of EuNRs and EuNR-RGO were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and IR spectroscopy. Then, we used EuNRs and EuNR-RGO as electrode materials to investigate their supercapacitive behavior using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. In a 3.0 M KCl electrolyte and with a scan rate of 2 mV s(-1), EuNR-RGO exhibited a specific capacity of 403 F g(-1). Galvanostatic charge-discharge experiments demonstrated a specific capacity of 345.9 F g(-1) at a current density of 2 A g(-1). The synergy between RGO's flexibility and EuNR's high charge mobility caused these noticeable properties.