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. |
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| 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] |
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| Database: | Engineering Source |
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| 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] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano15060423 |
