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High‐capacity anode derived from graphene oxide with lithium‐active functional groups.

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Title: High‐capacity anode derived from graphene oxide with lithium‐active functional groups.
Authors: Lee, Hae Ri1 (AUTHOR), Kim, Yun‐Sik1 (AUTHOR), Lee, Youn‐Ki2,3 (AUTHOR), Lee, Sungho2,4 (AUTHOR), Joh, Han‐Ik1 (AUTHOR) hijoh@konkuk.ac.kr
Source: International Journal of Energy Research. Feb2022, Vol. 46 Issue 2, p2021-2028. 8p.
Subjects: Graphene oxide, Functional groups, Carbonyl group, Raw materials, Electronic equipment, Anodes
Abstract: Summary: Applications utilizing Li‐ion batteries (LIBs) have recently been broadened from portable electronic devices to electric vehicles. Graphite has been applied as an anode material for commercialized LIBs; however, there is a growing demand for application‐oriented LIBs with higher energy and power densities, and faster charging, compared with its limited electrochemical properties. Heteroatom‐doped graphene has been considered as a potential alternative to graphite, although its synthesis is complex and costly. In this study, we introduced a facile strategy to realize advanced anode materials through fine control of the sheet size and oxygen‐containing functional groups on the surface of graphene oxide (GO) as a raw material for heteroatom‐doped graphene. The sheet size of GO is inversely proportional to the amount of oxidizing agent, which affects the formation of various types of oxygen‐containing functional groups at the edges of GO. Mild annealing of GO selectively removes the functional groups with weak binding strength, leading to the formation of GO maximized with carbonyl groups, which can interact with Li ions quickly and reversibly. The GO with the average sheet size of 500 nm developed in this study exhibits capacities of up to 779 and 220 mAh g−1 at 0.1 and 2 A g−1, respectively. Therefore, decreasing the sheet size of GO with mild‐temperature annealing increases the number of carbonyl groups formed on the additional exposed edge of the sheets, resulting in facile Li‐ion interaction and a higher capacity as an anode material. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Energy Research is the property of Wiley-Blackwell 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.)
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DbLabel: Engineering Source
An: 154864336
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  Data: High‐capacity anode derived from graphene oxide with lithium‐active functional groups.
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  Data: <searchLink fieldCode="AR" term="%22Lee%2C+Hae+Ri%22">Lee, Hae Ri</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kim%2C+Yun‐Sik%22">Kim, Yun‐Sik</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Youn‐Ki%22">Lee, Youn‐Ki</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Sungho%22">Lee, Sungho</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Joh%2C+Han‐Ik%22">Joh, Han‐Ik</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hijoh@konkuk.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Energy+Research%22">International Journal of Energy Research</searchLink>. Feb2022, Vol. 46 Issue 2, p2021-2028. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Graphene+oxide%22">Graphene oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Functional+groups%22">Functional groups</searchLink><br /><searchLink fieldCode="DE" term="%22Carbonyl+group%22">Carbonyl group</searchLink><br /><searchLink fieldCode="DE" term="%22Raw+materials%22">Raw materials</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+equipment%22">Electronic equipment</searchLink><br /><searchLink fieldCode="DE" term="%22Anodes%22">Anodes</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Summary: Applications utilizing Li‐ion batteries (LIBs) have recently been broadened from portable electronic devices to electric vehicles. Graphite has been applied as an anode material for commercialized LIBs; however, there is a growing demand for application‐oriented LIBs with higher energy and power densities, and faster charging, compared with its limited electrochemical properties. Heteroatom‐doped graphene has been considered as a potential alternative to graphite, although its synthesis is complex and costly. In this study, we introduced a facile strategy to realize advanced anode materials through fine control of the sheet size and oxygen‐containing functional groups on the surface of graphene oxide (GO) as a raw material for heteroatom‐doped graphene. The sheet size of GO is inversely proportional to the amount of oxidizing agent, which affects the formation of various types of oxygen‐containing functional groups at the edges of GO. Mild annealing of GO selectively removes the functional groups with weak binding strength, leading to the formation of GO maximized with carbonyl groups, which can interact with Li ions quickly and reversibly. The GO with the average sheet size of 500 nm developed in this study exhibits capacities of up to 779 and 220 mAh g−1 at 0.1 and 2 A g−1, respectively. Therefore, decreasing the sheet size of GO with mild‐temperature annealing increases the number of carbonyl groups formed on the additional exposed edge of the sheets, resulting in facile Li‐ion interaction and a higher capacity as an anode material. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of International Journal of Energy Research is the property of Wiley-Blackwell 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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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1002/er.7238
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 2021
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      – SubjectFull: Graphene oxide
        Type: general
      – SubjectFull: Functional groups
        Type: general
      – SubjectFull: Carbonyl group
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      – SubjectFull: Raw materials
        Type: general
      – SubjectFull: Electronic equipment
        Type: general
      – SubjectFull: Anodes
        Type: general
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      – TitleFull: High‐capacity anode derived from graphene oxide with lithium‐active functional groups.
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            NameFull: Lee, Hae Ri
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            NameFull: Kim, Yun‐Sik
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            NameFull: Lee, Youn‐Ki
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            NameFull: Lee, Sungho
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            NameFull: Joh, Han‐Ik
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            – D: 01
              M: 02
              Text: Feb2022
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              Y: 2022
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              Value: 46
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