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  • 王治宇 ( 教授 )

    的个人主页 http://faculty.dlut.edu.cn/zywang/zh_CN/index.htm

  •   教授   博士生导师   硕士生导师
论文成果 当前位置: 王治宇 >> 科学研究 >> 论文成果
Highly atom-economic synthesis of graphene/Mn3O4 hybrid composites for electrochemical supercapacitors

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论文类型:期刊论文
发表时间:2013-01-01
发表刊物:NANOSCALE
收录刊物:SCIE、EI、Scopus
卷号:5
期号:7
页面范围:2999-3005
ISSN号:2040-3364
摘要:A highly atom-economic procedure for the preparation of reduced graphene oxide/Mn3O4 (rGO/Mn3O4) composites is reported. Pristine graphene oxide/manganese sulfate (GO/MnSO4) suspension produced by modified Hummers method is utilized with high efficiency, which has been in situ converted into GO/Mn3O4 hybrid composite by air oxidation, then into rGO/Mn3O4 composite by means of dielectric barrier discharge (DBD) plasma-assisted deoxygenation. The Mn3O4 content of the rGO/Mn3O4 composites can be readily tailored. It is observed that Mn3O4 nanoparticles of 15-24 nm are well-dispersed on graphene sheets with Mn3O4 loading as high as 90%. The specific capacitance of the as-prepared rGO/Mn3O4 hybrids with 90% Mn3O4 reaches 193 F g(-1) when employed as the electrode material in neutral Na2SO4 electrolyte solutions (76 F g(-1) for pristine graphene and 95 F g(-1) for pure Mn3O4), which indicates the positive synergetic effects from both graphene and attached Mn3O4. The method developed in this study should offer a new technique for the large scale and highly atom-economic production of graphene/MnOx composites for many applications.

 

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