Manganosite-microwave exfoliated graphene oxide composites for asymmetric supercapacitor device applications

被引：83

作者：

Antiohos, Dennis ^{[1
]}

Pingmuang, Kanlaya ^{[2
]}

Romano, Mark S. ^{[1
]}

Beirne, Stephen ^{[1
]}

Romeo, Tony ^{[1
]}

Aitchison, Phil ^{[3
]}

Minett, Andrew ^{[4
]}

Wallace, Gordon ^{[1
]}

Phanichphant, Sukon ^{[2
]}

Chen, Jun ^{[1
]}

机构：

[1] Univ Wollongong, Intelligent Polymer Res Inst, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia

[2] Chiang Mai Univ, Mat Sci Res Ctr, Fac Sci, Chiang Mai 50200, Thailand

[3] CAP XX Australia Pty Ltd, Lane Cove, NSW 2066, Australia

[4] Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia

来源：

ELECTROCHIMICA ACTA | 2013年 / 101卷

基金：

澳大利亚研究理事会;

关键词：

Microwave exfoliated graphene oxide; Manganosite; Asymmetric supercapacitor; ELECTROCHEMICAL CHARACTERISTICS; CARBON NANOTUBES; ENERGY DENSITY; PERFORMANCE; ELECTRODES; GRAPHITE; INTERCALATION; TRANSITION; HYBRID; SHEETS;

D O I：

10.1016/j.electacta.2012.10.007

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

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.

引用

页码：99 / 108

页数：10

共 63 条

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