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Conductive Co3O4/graphene (core/shell) quantum dots as electrode materials for electrochemical pseudocapacitor applications.

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Title: Conductive Co3O4/graphene (core/shell) quantum dots as electrode materials for electrochemical pseudocapacitor applications.
Authors: Shim, Jaeho1,2, Ko, Yohan1,3, Lee, Kyu Seung1, Partha, Khanra1, Lee, Chil-Hyoung1, Yu, Kyoungsik2, Koo, Hye Young1, Lee, Ki-Tae3, Seo, Won-Seon4, Son, Dong Ick1,5 eastwing33@kist.re.kr
Source: Composites: Part B, Engineering. Dec2017, Vol. 130, p230-235. 6p.
Subjects: Quantum dots, Graphene, Nanostructured materials, Electrochemical analysis, Charge exchange
Abstract: This work reports on the in-situ chemical synthesis and their properties of the core (active material)/shell (conductive material) type Co 3 O 4 /graphene quantum dots (QDs). The stable oxygen bridge bonds between the Co 3 O 4 core and the oxygen-related functional groups on the graphene shells facilitate the efficient charge/discharge performance. The efficient electron transfer process between the Co 3 O 4 core and the graphene shell lead to an improvement in the electrochemical activity. The specific capacitances of Co 3 O 4 /graphene QDs electrode, without conductive additives, exhibit high values of 2435 F g −1 at current densities of 1 A g −1 . It breaks through 126% of the initial capacitance after 500 cycles and show above 112% even after 4500 cycles. The excellent performance of the Co 3 O 4 /G QDs electrode is attributed to the significant improvement of the electrochemical activity, without conductive additives, due to the presence of metal oxide QD covered by graphene shells which leads to the good electrical properties. [ABSTRACT FROM AUTHOR]
Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. 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: 125057829
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Conductive Co3O4/graphene (core/shell) quantum dots as electrode materials for electrochemical pseudocapacitor applications.
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  Data: <searchLink fieldCode="AR" term="%22Shim%2C+Jaeho%22">Shim, Jaeho</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Ko%2C+Yohan%22">Ko, Yohan</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Kyu+Seung%22">Lee, Kyu Seung</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Partha%2C+Khanra%22">Partha, Khanra</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Chil-Hyoung%22">Lee, Chil-Hyoung</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yu%2C+Kyoungsik%22">Yu, Kyoungsik</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Koo%2C+Hye+Young%22">Koo, Hye Young</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lee%2C+Ki-Tae%22">Lee, Ki-Tae</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Seo%2C+Won-Seon%22">Seo, Won-Seon</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Son%2C+Dong+Ick%22">Son, Dong Ick</searchLink><relatesTo>1,5</relatesTo><i> eastwing33@kist.re.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Composites%3A+Part+B%2C+Engineering%22">Composites: Part B, Engineering</searchLink>. Dec2017, Vol. 130, p230-235. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Quantum+dots%22">Quantum dots</searchLink><br /><searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructured+materials%22">Nanostructured materials</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+exchange%22">Charge exchange</searchLink>
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  Label: Abstract
  Group: Ab
  Data: This work reports on the in-situ chemical synthesis and their properties of the core (active material)/shell (conductive material) type Co 3 O 4 /graphene quantum dots (QDs). The stable oxygen bridge bonds between the Co 3 O 4 core and the oxygen-related functional groups on the graphene shells facilitate the efficient charge/discharge performance. The efficient electron transfer process between the Co 3 O 4 core and the graphene shell lead to an improvement in the electrochemical activity. The specific capacitances of Co 3 O 4 /graphene QDs electrode, without conductive additives, exhibit high values of 2435 F g −1 at current densities of 1 A g −1 . It breaks through 126% of the initial capacitance after 500 cycles and show above 112% even after 4500 cycles. The excellent performance of the Co 3 O 4 /G QDs electrode is attributed to the significant improvement of the electrochemical activity, without conductive additives, due to the presence of metal oxide QD covered by graphene shells which leads to the good electrical properties. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=125057829
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        Value: 10.1016/j.compositesb.2017.07.039
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 230
    Subjects:
      – SubjectFull: Quantum dots
        Type: general
      – SubjectFull: Graphene
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      – SubjectFull: Nanostructured materials
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      – SubjectFull: Electrochemical analysis
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      – SubjectFull: Charge exchange
        Type: general
    Titles:
      – TitleFull: Conductive Co3O4/graphene (core/shell) quantum dots as electrode materials for electrochemical pseudocapacitor applications.
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            – D: 01
              M: 12
              Text: Dec2017
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              Y: 2017
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