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Microwave-hydrothermal preparation of a graphene/hierarchy structure MnO2 composite for a supercapacitor
Alternative TitleParticuology
Chen, Zhong1; Li, Jianling1; Chen, Yu1; Zhang, Yakun1; Xu, Guofeng1; Yang, Jun2; Feng, Ye2
2014-08-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume15Issue:4Pages:27-33
AbstractGraphene/hierarchy structure manganese dioxide (GN/MnO2) composites were synthesized using a simple microwave-hydrothermal method. The properties of the prepared composites were analyzed using field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) measurements. The electrochemical performances of the composites were analyzed using cyclic voltammetry, electrochemical impedance spectrometry (EIS), and chronopotentiometry. The results showed that GN/MnO2 (10 wt% graphene) displayed a specific capacitance of 244 F/g at a current density of 100 mA/g. An excellent cyclic stability was obtained with a capacity retention of approximately 94.3% after 500 cycles in a 1 mol/L Li2SO4 solution. The improved electrochemical performance is attributed to the hierarchy structure of the manganese dioxide, which can enlarge the interface between the active materials and the electrolyte. The preparation route provides a new approach for hierarchy structure graphene composites; this work could be readily extended to the preparation of other graphene-based composites with different structures for use in energy storage devices. (C) 2013 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.; Graphene/hierarchy structure manganese dioxide (GN/MnO2) composites were synthesized using a simple microwave-hydrothermal method. The properties of the prepared composites were analyzed using field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) measurements. The electrochemical performances of the composites were analyzed using cyclic voltammetry, electrochemical impedance spectrometry (EIS), and chronopotentiometry. The results showed that GN/MnO2 (10 wt% graphene) displayed a specific capacitance of 244 F/g at a current density of 100 mA/g. An excellent cyclic stability was obtained with a capacity retention of approximately 94.3% after 500 cycles in a 1 mol/L Li2SO4 solution. The improved electrochemical performance is attributed to the hierarchy structure of the manganese dioxide, which can enlarge the interface between the active materials and the electrolyte. The preparation route provides a new approach for hierarchy structure graphene composites; this work could be readily extended to the preparation of other graphene-based composites with different structures for use in energy storage devices. (C) 2013 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
KeywordGraphene Mno2 Hierarchy Structure Supercapacitor
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2012.12.008
URL查看原文
Indexed BySCI
Language英语
WOS KeywordELECTROCHEMICAL CAPACITORS ; GRAPHENE OXIDE ; ELECTRODE ; DEPOSITION ; FILMS
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
WOS IDWOS:000340329500005
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11355
Collection研究所(批量导入)
Affiliation1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhong,Li, Jianling,Chen, Yu,et al. Microwave-hydrothermal preparation of a graphene/hierarchy structure MnO2 composite for a supercapacitor[J]. PARTICUOLOGY,2014,15(4):27-33.
APA Chen, Zhong.,Li, Jianling.,Chen, Yu.,Zhang, Yakun.,Xu, Guofeng.,...&Feng, Ye.(2014).Microwave-hydrothermal preparation of a graphene/hierarchy structure MnO2 composite for a supercapacitor.PARTICUOLOGY,15(4),27-33.
MLA Chen, Zhong,et al."Microwave-hydrothermal preparation of a graphene/hierarchy structure MnO2 composite for a supercapacitor".PARTICUOLOGY 15.4(2014):27-33.
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