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Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage.

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Title: Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage.
Authors: Lin, LiLin1 (AUTHOR), Zhou, Peijun1 (AUTHOR), Xiong, Wen1 (AUTHOR), Zhao, Tingting2 (AUTHOR), Li, Shengsong1 (AUTHOR), Yang, Liangui1 (AUTHOR), Meng, Tao1 (AUTHOR) mengt@scnu.edu.cn, Zhong, Junhao1 (AUTHOR), Cui, Zhibiao1 (AUTHOR), Shu, Dong1,3 (AUTHOR) dshu@scnu.edu.cn
Source: Chemical Engineering Journal. Nov2024, Vol. 499, pN.PAG-N.PAG. 1p.
Subjects: Chemical kinetics, Structural stability, Electrode reactions, Carbon nanotubes, Silicon surfaces
Abstract: Building 2D/3D carbon hierarchical structures on the surface of silicon particles to optimize the electron/Li-ion reaction kinetics and alleviate the stress accumulation in silicon-based anode for stable Li-ion storage. [Display omitted] • Constructing 2D/3D hybrid structure within the Si anode show stable Li-ion storage. • Theoretical simulations analyze the physicochemical properties of the composites. • The fabricated Si-based anode exhibits superior electrochemical performance. • The electrode reaction and stress dissipation mechanisms are well demonstrated. Three-dimensional (3D) conductive skeletons can optimize electron/Li-ion migration kinetics and alleviate stress accumulation for silicon (Si)-based electrodes. In this study, the modified carbon nanotubes (MCNs) are used as a stress-buffering and high-speed conducting framework, and a hierarchical structure of 3D MCNs interspersed with flour-derived 2D N-doped C layer is designed for Si anode via molecular self-assembly and in-situ carbonization strategies. Experimental and theoretical calculations show that the charge redistribution occurred in the fabricated SiO x and N-doped C interfaces, which induced an electric field response and increased the interfacial electron/Li-ion transfer rate. Multiphysics simulations show that the 2D/3D hierarchical structures of carbon can optimize the physicochemical properties, such as a favorable local electronic environment, flexible stress dissipation mechanisms and good thermal stability. The prepared electrode with 77.1 wt% Si@SiO x shows a low volume expansion rate of 23 % and has an excellent Li-ion storage capability (972.1 mAh g−1 at 4000 mA g−1). Moreover, the structural stability of fabricated Si-based electrodes is enhanced, achieving 0.04 % per cycle capacity decay for 500 cycles at 2000 mA g−1. Such integrating the 2D/3D carbon framework to manipulate Si interfacial properties provides fundamental research for other electrodes plagued by significant volume expansion. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Journal 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.)
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  Label: Title
  Group: Ti
  Data: Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage.
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+LiLin%22">Lin, LiLin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Peijun%22">Zhou, Peijun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiong%2C+Wen%22">Xiong, Wen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Tingting%22">Zhao, Tingting</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shengsong%22">Li, Shengsong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Liangui%22">Yang, Liangui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Meng%2C+Tao%22">Meng, Tao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mengt@scnu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhong%2C+Junhao%22">Zhong, Junhao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cui%2C+Zhibiao%22">Cui, Zhibiao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shu%2C+Dong%22">Shu, Dong</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> dshu@scnu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Journal%22">Chemical Engineering Journal</searchLink>. Nov2024, Vol. 499, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+stability%22">Structural stability</searchLink><br /><searchLink fieldCode="DE" term="%22Electrode+reactions%22">Electrode reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+nanotubes%22">Carbon nanotubes</searchLink><br /><searchLink fieldCode="DE" term="%22Silicon+surfaces%22">Silicon surfaces</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Building 2D/3D carbon hierarchical structures on the surface of silicon particles to optimize the electron/Li-ion reaction kinetics and alleviate the stress accumulation in silicon-based anode for stable Li-ion storage. [Display omitted] • Constructing 2D/3D hybrid structure within the Si anode show stable Li-ion storage. • Theoretical simulations analyze the physicochemical properties of the composites. • The fabricated Si-based anode exhibits superior electrochemical performance. • The electrode reaction and stress dissipation mechanisms are well demonstrated. Three-dimensional (3D) conductive skeletons can optimize electron/Li-ion migration kinetics and alleviate stress accumulation for silicon (Si)-based electrodes. In this study, the modified carbon nanotubes (MCNs) are used as a stress-buffering and high-speed conducting framework, and a hierarchical structure of 3D MCNs interspersed with flour-derived 2D N-doped C layer is designed for Si anode via molecular self-assembly and in-situ carbonization strategies. Experimental and theoretical calculations show that the charge redistribution occurred in the fabricated SiO x and N-doped C interfaces, which induced an electric field response and increased the interfacial electron/Li-ion transfer rate. Multiphysics simulations show that the 2D/3D hierarchical structures of carbon can optimize the physicochemical properties, such as a favorable local electronic environment, flexible stress dissipation mechanisms and good thermal stability. The prepared electrode with 77.1 wt% Si@SiO x shows a low volume expansion rate of 23 % and has an excellent Li-ion storage capability (972.1 mAh g−1 at 4000 mA g−1). Moreover, the structural stability of fabricated Si-based electrodes is enhanced, achieving 0.04 % per cycle capacity decay for 500 cycles at 2000 mA g−1. Such integrating the 2D/3D carbon framework to manipulate Si interfacial properties provides fundamental research for other electrodes plagued by significant volume expansion. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Engineering Journal 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.)
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      – Type: doi
        Value: 10.1016/j.cej.2024.156266
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Chemical kinetics
        Type: general
      – SubjectFull: Structural stability
        Type: general
      – SubjectFull: Electrode reactions
        Type: general
      – SubjectFull: Carbon nanotubes
        Type: general
      – SubjectFull: Silicon surfaces
        Type: general
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      – TitleFull: Hybrid 2D/3D carbon framework confined Si with optimized reaction kinetics for highly stable Li-Ion storage.
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              M: 11
              Text: Nov2024
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