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Facile synthesis of hierarchical mesoporous beta-manganese dioxide nanoflowers with extremely high specific surface areas for high-performance electrochemical capacitors.

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Title: Facile synthesis of hierarchical mesoporous beta-manganese dioxide nanoflowers with extremely high specific surface areas for high-performance electrochemical capacitors.
Authors: Li, Rong-Bing1, Yu, Li-Li1 lly522@shu.edu.cn, Li, Shuang1, Fan, Jun1, Luo, Rong1, Zhao, Jing-Tai1,2 jtzhao@shu.edu.cn
Source: Electrochimica Acta. Sep2018, Vol. 284, p52-59. 8p.
Subjects: Nanorods, Surface area, Current density (Electromagnetism), Biochemical substrates, Supercapacitors, Manganese dioxide
Abstract: Ultrathin nanorods self-assembled porous nanoflowers to form hierarchical mesoporous beta -manganese dioxide (β-MnO 2 ) with extremely high specific surface areas of >400 m 2  g −1 are fabricated in high yield at room temperature in a simple 1,2-butanediol/KMnO 4 system. As supercapacitor electrodes, specific capacitances of as-prepared β-MnO 2 nanoflowers can reach 500-430 F g −1 at a current density of 0.1 A g −1 in 0.5 M Na 2 SO 4 aqueous electrolytes. And greatly enhanced rate capability of 66.4% at 20 A g −1 with a good cycling stability of 95.5% (10 A g −1 , after 5000 cycles) is obtained by reducing the particle size of β-MnO 2 nanoflowers with well-defined morphologies, which can be achieved by regulating the molar ratios of the reactants. In view of its easy preparation, the as-prepared β-MnO 2 is considered as a promising candidate for high-performance supercapacitor electrode material. [ABSTRACT FROM AUTHOR]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 131355476
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Facile synthesis of hierarchical mesoporous beta-manganese dioxide nanoflowers with extremely high specific surface areas for high-performance electrochemical capacitors.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Rong-Bing%22">Li, Rong-Bing</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yu%2C+Li-Li%22">Yu, Li-Li</searchLink><relatesTo>1</relatesTo><i> lly522@shu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Li%2C+Shuang%22">Li, Shuang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fan%2C+Jun%22">Fan, Jun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Luo%2C+Rong%22">Luo, Rong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Jing-Tai%22">Zhao, Jing-Tai</searchLink><relatesTo>1,2</relatesTo><i> jtzhao@shu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. Sep2018, Vol. 284, p52-59. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Nanorods%22">Nanorods</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+area%22">Surface area</searchLink><br /><searchLink fieldCode="DE" term="%22Current+density+%28Electromagnetism%29%22">Current density (Electromagnetism)</searchLink><br /><searchLink fieldCode="DE" term="%22Biochemical+substrates%22">Biochemical substrates</searchLink><br /><searchLink fieldCode="DE" term="%22Supercapacitors%22">Supercapacitors</searchLink><br /><searchLink fieldCode="DE" term="%22Manganese+dioxide%22">Manganese dioxide</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Ultrathin nanorods self-assembled porous nanoflowers to form hierarchical mesoporous beta -manganese dioxide (β-MnO 2 ) with extremely high specific surface areas of >400 m 2  g −1 are fabricated in high yield at room temperature in a simple 1,2-butanediol/KMnO 4 system. As supercapacitor electrodes, specific capacitances of as-prepared β-MnO 2 nanoflowers can reach 500-430 F g −1 at a current density of 0.1 A g −1 in 0.5 M Na 2 SO 4 aqueous electrolytes. And greatly enhanced rate capability of 66.4% at 20 A g −1 with a good cycling stability of 95.5% (10 A g −1 , after 5000 cycles) is obtained by reducing the particle size of β-MnO 2 nanoflowers with well-defined morphologies, which can be achieved by regulating the molar ratios of the reactants. In view of its easy preparation, the as-prepared β-MnO 2 is considered as a promising candidate for high-performance supercapacitor electrode material. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.electacta.2018.07.172
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 52
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      – SubjectFull: Nanorods
        Type: general
      – SubjectFull: Surface area
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      – SubjectFull: Current density (Electromagnetism)
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      – SubjectFull: Biochemical substrates
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      – SubjectFull: Supercapacitors
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      – SubjectFull: Manganese dioxide
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      – TitleFull: Facile synthesis of hierarchical mesoporous beta-manganese dioxide nanoflowers with extremely high specific surface areas for high-performance electrochemical capacitors.
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            NameFull: Li, Rong-Bing
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            NameFull: Yu, Li-Li
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            NameFull: Fan, Jun
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            NameFull: Zhao, Jing-Tai
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              M: 09
              Text: Sep2018
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              Y: 2018
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              Value: 284
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            – TitleFull: Electrochimica Acta
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