Microwave assisted synthesis of MnO2 on nickel foam-graphene for electrochemical capacitor

被引：51

作者：

Bello, A. ^{[1
]}

Fashedemi, O. O. ^{[2
]}

Fabiane, M. ^{[1
]}

Lekitima, J. N. ^{[2
]}

Ozoemena, K. I. ^{[2
,3
]}

Manyala, N. ^{[1
]}

机构：

[1] Univ Pretoria, Dept Phys, Inst Appl Mat, SARCHI Chair Carbon Technol & Mat, ZA-0028 Pretoria, South Africa

[2] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa

[3] CSIR, ZA-0001 Pretoria, South Africa

来源：

ELECTROCHIMICA ACTA | 2013年 / 114卷

基金：

新加坡国家研究基金会;

关键词：

Nickel foam-graphene (NF-G); CVD; Microwave irradiation; Nanostructure MnO2; Electrochemical capacitor; HYBRID SUPERCAPACITOR; NANOSTRUCTURED MNO2; RAMAN-SPECTROSCOPY; CARBON MATERIALS; MANGANESE OXIDE; PERFORMANCE; COMPOSITES; ELECTRODES; ENERGY;

D O I：

10.1016/j.electacta.2013.09.134

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A green chemistry approach (hydrothermal microwave irradiation) has been used to deposit manganese oxide on nickel foam-graphene. The 3D graphene was synthesized using nickel foam template by chemical vapor deposition (CVD) technique. Raman spectroscopy, X-ray diffraction (XRD), scanning electron and transmission electron microscopies (SEM and TEM) have been used to characterize structure and surface morphology of the composite, respectively. The Raman spectroscopy measurements on the samples reveal that 3D graphene consists of mostly few layers with low defect density. The composite was tested in a three electrode configuration for electrochemical capacitor, and exhibited a specific capacitance of 305 F g(-1) at a current density of 1 A g(-1) and showed excellent cycling stability. The obtained results demonstrate that microwave irradiation technique could be a promising approach to synthesis graphene based functional materials for electrochemical applications. Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.

引用

页码：48 / 53

页数：6

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