Mn3O4 nanoparticles embedded into graphene nanosheets: Preparation, characterization, and electrochemical properties for supercapacitors

被引：216

作者：

Wang, Bei ^{[1
,2
,3
]}

Park, Jinsoo ^{[4
]}

Wang, Chengyin ^{[3
]}

Ahn, Hyojun ^{[4
]}

Wang, Guoxiu ^{[1
,2
,3
]}

机构：

[1] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[3] Univ Technol Sydney, Dept Chem & Forens Sci, Sydney, NSW 2007, Australia

[4] Gyeongsang Natl Univ, Sch Mat Sci & Engn, Jinju 660701, Gyeongnam, South Korea

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 22期

基金：

澳大利亚研究理事会;

关键词：

Graphene; Mn3O4; nanoparticle; Nanocomposite; Cyclic voltammetry; Supercapacitor; ELASTIC PROPERTIES; LITHIUM STORAGE; CARBON; PERFORMANCE; GRAPHITE; SHEETS; ELECTRODES; FILMS;

D O I：

10.1016/j.electacta.2010.05.086

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mn3O4/graphene nanocomposites were synthesized by mixing graphene suspension in ethylene glycol with MnO2 organosol, followed by subsequent ultrasonication processing and heat treatment. The as-prepared product consists of nanosized Mn3O4 particles homogeneously distributed on graphene nanosheets, which has been confirmed by field emission scanning electron microscopy and transmission electron microscopy analysis. Atomic force microscope analysis further identified the distribution of dense Mn3O4 nanoparticles on graphene nanosheets. When used as electrode materials in supercapacitors, Mn3O4/graphene nanocomposites exhibited a high specific capacitance of 175 Fg(-1) in 1 M Na2SO4 electrolyte and 256 Fg(-1) in 6M KOH electrolyte, respectively. The enhanced supercapacitance of Mn3O4/graphene nanocomposites could be ascribed to both electrochemical contributions of Mn3O4 nanoparticles, functional groups attached to graphene nanosheets, and significantly increased specific surface area. (c) 2010 Elsevier Ltd. All rights reserved.

引用

页码：6812 / 6817

页数：6

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