• 文献标题:   Manganosite-microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications
  • 文献类型:   Article
  • 作  者:   ANTIOHOS D, PINGMUANG K, ROMANO MS, BEIRNE S, ROMEO T, AITCHISON P, MINETT A, WALLACE G, PHANICHPHANT S, CHEN J
  • 作者关键词:   microwave exfoliated graphene oxide, manganosite, asymmetric supercapacitor
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Chiang Mai Univ
  • 被引频次:   63
  • DOI:   10.1016/j.electacta.2012.10.007
  • 出版年:   2013

▎ 摘  要

Graphene based materials coupled with transition metal oxides are promising electrode materials in asymmetric supercapacitors owing to their unique properties which include high surface area, good chemical stability, electrical conductivity, abundance, and lower cost profile over time. In this paper a composite material consisting of graphene oxide exfoliated with microwave radiation (mw rGO), and manganosite (MnO) is synthesised in order to explore their potential as an electrode material. The composite material was characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to explore the process occurring at the electrode/electrolyte interface. Long term cyclability and stability were investigated using galvanostatic charge/discharge testing. From the resulting analysis, an asymmetric supercapacitor was constructed with the best composite containing 90% MnO-10% mw rGO (w/w). The device exhibited a capacitance of 0.11 F/cm(2) (51.5 F/g by mass) and excellent capacity retention of 82% after 15,000 cycles at a current density of 0.5 A/g. (C) 2012 Elsevier Ltd. All rights reserved.