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Efficient Preparation of Spongy-Like Porous-Activated Carbon from Waste Millfeed Towards High Performance Supercapacitors.

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Title: Efficient Preparation of Spongy-Like Porous-Activated Carbon from Waste Millfeed Towards High Performance Supercapacitors.
Authors: Han, Rong-Rong1 (AUTHOR), Zhu, Hao-Yan1 (AUTHOR), Li, Min-Peng1 (AUTHOR), Yang, Wen-Tong1 (AUTHOR), Lu, Chun1 (AUTHOR), Zhang, Yu-Shan1 (AUTHOR), Zhang, Bin-Mei1 (AUTHOR), Liang, Xiao-Rong1 (AUTHOR), Liu, Mao-Cheng1,2 (AUTHOR) liumc@lut.edu.cn
Source: NANO (1793-2920). Aug2020, Vol. 15 Issue 08, pN.PAG-N.PAG. 11p.
Subjects: Supercapacitor electrodes, Activated carbon, Supercapacitor performance, Energy density, Power density, Electrode potential, Carbon
Abstract: Biomass-based activated porous carbon (PC) with large porosity and high surface area has been considered as potential electrode material for supercapacitors. The spongy-like porous-activated carbon (SPAC) was prepared from millfeed by one-step carbonization/activation with KOH treatment. It shows three-dimensional (3D) spongy-like structure and high specific surface area (1535 m2 g − 1 ). The SPAC electrode exhibits a high specific capacitance (237.9 F g − 1 at a current density of 0.5 A g − 1 ) and a superior cycle stability (the capacitance retention of 95% after 10 000 cycles at 2 A g − 1 ) in 2 M KOH electrolyte, while the SPAC reveals a high specific capacitance of 157 F g − 1 at 0.5 A g − 1 , good electrochemical stability with 93% capacitance retention after 5000 cycles in ionic liquids. Furthermore, the specific capacitance of SPAC//SPAC supercapacitor reaches 82.1 F g − 1 at a current density of 0.5 A g − 1 and achieves a high capacitance retention of 75% when the charging current increases to 10 A g − 1 in 2 M KOH electrolyte. The SPAC//SPAC supercapacitor possesses a high specific capacitance of 29.6 F g − 1 at 0.5 A g − 1 and a preeminent energy density of 27.8 Wh kg − 1 (at a power density of 640 W kg − 1 ) in ionic liquids. This paper provides a convenient approach to synthesize low-cost biomass-based carbon material for supercapacitor applications. A spongy-link porous activated carbon (SPAC) was fabricated from millfeed in one-step carbonization/activation with in situ activation of the KOH method. The concentration of KOH plays a key role in the formation of porous structure under the experimental condition. The symmetrical SPAC/SPAC supercapacitor possesses excellent cycling stability and high energy density in KOH aqueous and ionic liquid electrolytes. [ABSTRACT FROM AUTHOR]
Copyright of NANO (1793-2920) is the property of World Scientific Publishing Company 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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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Efficient Preparation of Spongy-Like Porous-Activated Carbon from Waste Millfeed Towards High Performance Supercapacitors.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Han%2C+Rong-Rong%22">Han, Rong-Rong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Hao-Yan%22">Zhu, Hao-Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Min-Peng%22">Li, Min-Peng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Wen-Tong%22">Yang, Wen-Tong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Chun%22">Lu, Chun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yu-Shan%22">Zhang, Yu-Shan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Bin-Mei%22">Zhang, Bin-Mei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liang%2C+Xiao-Rong%22">Liang, Xiao-Rong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Mao-Cheng%22">Liu, Mao-Cheng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> liumc@lut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22NANO+%281793-2920%29%22">NANO (1793-2920)</searchLink>. Aug2020, Vol. 15 Issue 08, pN.PAG-N.PAG. 11p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Supercapacitor+electrodes%22">Supercapacitor electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Activated+carbon%22">Activated carbon</searchLink><br /><searchLink fieldCode="DE" term="%22Supercapacitor+performance%22">Supercapacitor performance</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+density%22">Energy density</searchLink><br /><searchLink fieldCode="DE" term="%22Power+density%22">Power density</searchLink><br /><searchLink fieldCode="DE" term="%22Electrode+potential%22">Electrode potential</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon%22">Carbon</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Biomass-based activated porous carbon (PC) with large porosity and high surface area has been considered as potential electrode material for supercapacitors. The spongy-like porous-activated carbon (SPAC) was prepared from millfeed by one-step carbonization/activation with KOH treatment. It shows three-dimensional (3D) spongy-like structure and high specific surface area (1535 m2 g − 1 ). The SPAC electrode exhibits a high specific capacitance (237.9 F g − 1 at a current density of 0.5 A g − 1 ) and a superior cycle stability (the capacitance retention of 95% after 10 000 cycles at 2 A g − 1 ) in 2 M KOH electrolyte, while the SPAC reveals a high specific capacitance of 157 F g − 1 at 0.5 A g − 1 , good electrochemical stability with 93% capacitance retention after 5000 cycles in ionic liquids. Furthermore, the specific capacitance of SPAC//SPAC supercapacitor reaches 82.1 F g − 1 at a current density of 0.5 A g − 1 and achieves a high capacitance retention of 75% when the charging current increases to 10 A g − 1 in 2 M KOH electrolyte. The SPAC//SPAC supercapacitor possesses a high specific capacitance of 29.6 F g − 1 at 0.5 A g − 1 and a preeminent energy density of 27.8 Wh kg − 1 (at a power density of 640 W kg − 1 ) in ionic liquids. This paper provides a convenient approach to synthesize low-cost biomass-based carbon material for supercapacitor applications. A spongy-link porous activated carbon (SPAC) was fabricated from millfeed in one-step carbonization/activation with in situ activation of the KOH method. The concentration of KOH plays a key role in the formation of porous structure under the experimental condition. The symmetrical SPAC/SPAC supercapacitor possesses excellent cycling stability and high energy density in KOH aqueous and ionic liquid electrolytes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of NANO (1793-2920) is the property of World Scientific Publishing Company 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: 10.1142/S1793292020501064
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Supercapacitor electrodes
        Type: general
      – SubjectFull: Activated carbon
        Type: general
      – SubjectFull: Supercapacitor performance
        Type: general
      – SubjectFull: Energy density
        Type: general
      – SubjectFull: Power density
        Type: general
      – SubjectFull: Electrode potential
        Type: general
      – SubjectFull: Carbon
        Type: general
    Titles:
      – TitleFull: Efficient Preparation of Spongy-Like Porous-Activated Carbon from Waste Millfeed Towards High Performance Supercapacitors.
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            NameFull: Han, Rong-Rong
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              M: 08
              Text: Aug2020
              Type: published
              Y: 2020
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