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Layer-by-Layer Assembly of Hierarchical Cotton-Derived C/Cu 2 O/Na 2 MoO 4 Composite Fibers as Anodes for Lithium-Ion Batteries.

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Title: Layer-by-Layer Assembly of Hierarchical Cotton-Derived C/Cu 2 O/Na 2 MoO 4 Composite Fibers as Anodes for Lithium-Ion Batteries.
Authors: Li, Shun1,2 (AUTHOR), Zhang, Jidong2 (AUTHOR), Li, Shuqi1 (AUTHOR), Guan, Ying1,2 (AUTHOR), He, Guijin2 (AUTHOR)
Source: Nanomaterials (2079-4991). Sep2026, Vol. 16 Issue 18, p1160. 16p.
Subjects: Lithium-ion batteries, Anodes, Biomass, Thin film deposition, Electrochemistry, Fibrous composites, Electrochemical analysis
Abstract: Sodium molybdate (Na2MoO4) is attractive for lithium storage because of its multielectron conversion chemistry, but its low electrical conductivity and structural reconstruction during cycling limit active-material utilization and long-term reversibility. Here, hierarchical C/Cu2O/Na2MoO4 composite fibers were constructed by combining a cotton-derived micro/nanofibrous carbon framework with Cu2O interfacial modification and electrostatic layer-by-layer (LbL) assembly. The resulting architecture retains the interconnected fibrous structure of the original cotton fibers. A Na2MoO4-containing active layer is constructed on the Cu2O-modified carbon fiber surface, and its loading can be regulated by changing the number of LbL assembly cycles. When evaluated as an anode for lithium-ion batteries, the C/Cu2O/Na2MoO4-50 composite exhibits the best overall electrochemical performance, with an initial Coulombic efficiency of 65.2% and a reversible capacity of approximately 579.3 mAh g−1 after 1000 cycles, whereas pristine Na2MoO4 retains only about 66.7 mAh g−1. The hierarchical fibrous carbon network supplies long-range electron conduction, while the micro- and nanoscale fiber surface places the conversion-active phase close to the electrolyte and shortens the Li+ transport distance. The Cu2O-modified surface provides the interface for subsequent LbL deposition, allowing Na2MoO4 to remain distributed along the conductive fiber rather than forming an isolated bulk active phase. This work shows that combining biomass-derived structural inheritance with controllable LbL assembly provides a viable route for regulating the integration and utilization of conversion-active phases in lithium storage electrodes. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI 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
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  Data: Layer-by-Layer Assembly of Hierarchical Cotton-Derived C/Cu 2 O/Na 2 MoO 4 Composite Fibers as Anodes for Lithium-Ion Batteries.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Shun%22">Li, Shun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jidong%22">Zhang, Jidong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Shuqi%22">Li, Shuqi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guan%2C+Ying%22">Guan, Ying</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22He%2C+Guijin%22">He, Guijin</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Sep2026, Vol. 16 Issue 18, p1160. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Lithium-ion+batteries%22">Lithium-ion batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Anodes%22">Anodes</searchLink><br /><searchLink fieldCode="DE" term="%22Biomass%22">Biomass</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+film+deposition%22">Thin film deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemistry%22">Electrochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Fibrous+composites%22">Fibrous composites</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Sodium molybdate (Na2MoO4) is attractive for lithium storage because of its multielectron conversion chemistry, but its low electrical conductivity and structural reconstruction during cycling limit active-material utilization and long-term reversibility. Here, hierarchical C/Cu2O/Na2MoO4 composite fibers were constructed by combining a cotton-derived micro/nanofibrous carbon framework with Cu2O interfacial modification and electrostatic layer-by-layer (LbL) assembly. The resulting architecture retains the interconnected fibrous structure of the original cotton fibers. A Na2MoO4-containing active layer is constructed on the Cu2O-modified carbon fiber surface, and its loading can be regulated by changing the number of LbL assembly cycles. When evaluated as an anode for lithium-ion batteries, the C/Cu2O/Na2MoO4-50 composite exhibits the best overall electrochemical performance, with an initial Coulombic efficiency of 65.2% and a reversible capacity of approximately 579.3 mAh g−1 after 1000 cycles, whereas pristine Na2MoO4 retains only about 66.7 mAh g−1. The hierarchical fibrous carbon network supplies long-range electron conduction, while the micro- and nanoscale fiber surface places the conversion-active phase close to the electrolyte and shortens the Li+ transport distance. The Cu2O-modified surface provides the interface for subsequent LbL deposition, allowing Na2MoO4 to remain distributed along the conductive fiber rather than forming an isolated bulk active phase. This work shows that combining biomass-derived structural inheritance with controllable LbL assembly provides a viable route for regulating the integration and utilization of conversion-active phases in lithium storage electrodes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: 10.3390/nano16181160
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      – Code: eng
        Text: English
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        PageCount: 16
        StartPage: 1160
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      – SubjectFull: Lithium-ion batteries
        Type: general
      – SubjectFull: Anodes
        Type: general
      – SubjectFull: Biomass
        Type: general
      – SubjectFull: Thin film deposition
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      – SubjectFull: Electrochemistry
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      – SubjectFull: Fibrous composites
        Type: general
      – SubjectFull: Electrochemical analysis
        Type: general
    Titles:
      – TitleFull: Layer-by-Layer Assembly of Hierarchical Cotton-Derived C/Cu 2 O/Na 2 MoO 4 Composite Fibers as Anodes for Lithium-Ion Batteries.
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            NameFull: Li, Shun
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            NameFull: Zhang, Jidong
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            NameFull: Li, Shuqi
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            NameFull: Guan, Ying
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              M: 09
              Text: Sep2026
              Type: published
              Y: 2026
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