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Unlocking the Potential of Na 2 Ti 3 O 7 -C Hollow Microspheres in Sodium-Ion Batteries via Template-Free Synthesis.

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Title: Unlocking the Potential of Na 2 Ti 3 O 7 -C Hollow Microspheres in Sodium-Ion Batteries via Template-Free Synthesis.
Authors: Sun, Yong-Gang1 (AUTHOR), Hu, Yu1,2 (AUTHOR), Dong, Li1,3 (AUTHOR), Zhou, Ting-Ting1 (AUTHOR), Qian, Xiang-Yu1 (AUTHOR), Zhang, Fa-Jia1 (AUTHOR), Shen, Jia-Qi1 (AUTHOR), Shan, Zhi-Yang1 (AUTHOR), Yang, Li-Ping1,2 (AUTHOR), Lin, Xi-Jie3 (AUTHOR)
Source: Nanomaterials (2079-4991). Mar2025, Vol. 15 Issue 6, p423. 11p.
Subjects: Diffusion kinetics, Heat treatment, Structural stability, Energy storage, Anodes, Electric batteries, Sodium ions
Abstract: Layered sodium trititanate (Na2Ti3O7) is a promising anode material for sodium-ion batteries due to its suitable charge/discharge plateaus, cost-effectiveness, and eco-friendliness. However, its slow Na+ diffusion kinetics, poor electron conductivity, and instability during cycling pose significant challenges for practical applications. To address these issues, we developed a template-free method to synthesize Na2Ti3O7-C hollow microspheres. The synthesis began with polymerization-induced colloid aggregation to form a TiO2–urea–formaldehyde (TiO2-UF) precursor, which was then subjected to heat treatment to induce inward crystallization, creating hollow cavities within the microspheres. The hollow structure, combined with a conductive carbon matrix, significantly enhanced the cycling performance and rate capability of the material. When used as an anode, the Na2Ti3O7-C hollow microspheres exhibited a high reversible capacity of 188 mAh g−1 at 0.2C and retained 169 mAh g−1 after 500 cycles. Additionally, the material demonstrated excellent rate performance with capacities of 157, 133, 105, 77, 62, and 45 mAh g−1 at current densities of 0.5, 1, 2, 5, 10, and 20C, respectively. This innovative approach provides a new strategy for developing high-performance sodium-ion battery anodes and has the potential to significantly advance the field of energy storage. [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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  Data: Unlocking the Potential of Na 2 Ti 3 O 7 -C Hollow Microspheres in Sodium-Ion Batteries via Template-Free Synthesis.
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  Data: Layered sodium trititanate (Na2Ti3O7) is a promising anode material for sodium-ion batteries due to its suitable charge/discharge plateaus, cost-effectiveness, and eco-friendliness. However, its slow Na+ diffusion kinetics, poor electron conductivity, and instability during cycling pose significant challenges for practical applications. To address these issues, we developed a template-free method to synthesize Na2Ti3O7-C hollow microspheres. The synthesis began with polymerization-induced colloid aggregation to form a TiO2–urea–formaldehyde (TiO2-UF) precursor, which was then subjected to heat treatment to induce inward crystallization, creating hollow cavities within the microspheres. The hollow structure, combined with a conductive carbon matrix, significantly enhanced the cycling performance and rate capability of the material. When used as an anode, the Na2Ti3O7-C hollow microspheres exhibited a high reversible capacity of 188 mAh g−1 at 0.2C and retained 169 mAh g−1 after 500 cycles. Additionally, the material demonstrated excellent rate performance with capacities of 157, 133, 105, 77, 62, and 45 mAh g−1 at current densities of 0.5, 1, 2, 5, 10, and 20C, respectively. This innovative approach provides a new strategy for developing high-performance sodium-ion battery anodes and has the potential to significantly advance the field of energy storage. [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/nano15060423
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        Text: English
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        PageCount: 11
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      – SubjectFull: Diffusion kinetics
        Type: general
      – SubjectFull: Heat treatment
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      – SubjectFull: Structural stability
        Type: general
      – SubjectFull: Energy storage
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      – SubjectFull: Anodes
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      – SubjectFull: Electric batteries
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      – SubjectFull: Sodium ions
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      – TitleFull: Unlocking the Potential of Na 2 Ti 3 O 7 -C Hollow Microspheres in Sodium-Ion Batteries via Template-Free Synthesis.
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              Text: Mar2025
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