Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage
Abstract Developing high‐capacity and high‐rate anodes is significant to engineering sodium‐ion batteries with high energy density and high power density. Layered Na2Ti3O7 (NTO), with an open crystal structure, large theoretical capacity, and low working potential, is recognized as one of the prospe...
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Wiley
2024-10-01
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| Series: | Carbon Energy |
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| Online Access: | https://doi.org/10.1002/cey2.560 |
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| author | Ru‐Ning Tian Siwei Zhao Zhuoran Lv Guozhong Lu Mengnuo Fu Jingjing Chen Dajian Wang Chenlong Dong Zhiyong Mao |
| author_facet | Ru‐Ning Tian Siwei Zhao Zhuoran Lv Guozhong Lu Mengnuo Fu Jingjing Chen Dajian Wang Chenlong Dong Zhiyong Mao |
| author_sort | Ru‐Ning Tian |
| collection | DOAJ |
| description | Abstract Developing high‐capacity and high‐rate anodes is significant to engineering sodium‐ion batteries with high energy density and high power density. Layered Na2Ti3O7 (NTO), with an open crystal structure, large theoretical capacity, and low working potential, is recognized as one of the prospective anodes for sodium storage. Nevertheless, it suffers from sluggish sodiation kinetics and low (micro)structure stability triggered by a high Na+ diffusion barrier and weak adhesion of [Ti3O7] slabs. Herein, the interlayered local structure of NTO is regulated to solve the above issues, in which parts of interlayered Na+ sites are substituted by H+ (Na2−xHxTi3O7 [NHTO]). Theoretical calculations prove that the NHTO offers lower activation energy for Na+ transports and low interlayer spacings with alleviated Na–Na repulsion and relatively flexible [Ti3O7] slabs to reduce fractural stress. In situ and ex situ characterizations of (micro)structure evolution reveal that NHTO goes through transformation between H‐rich and Na‐rich phases, resulting in high structure stability and microstructure integrity. The optimal NHTO anode delivers a high capacity of 190.6 mA h g−1 at 0.5 C after 300 cycles and a superior high‐rate stability of 90.6 mA h g−1 at 50 C over 10,000 cycles at room temperature. Besides, it offers a capacity of 50.3 mA h g−1 after 1800 cycles at a low temperature of −20°C and 195.7 mA h g−1 after 500 cycles at a high temperature of 40°C at 0.5 C. The developed topologically interlayered local structure regulation strategy would raise the prospect of designing high‐performance layered anodes. |
| format | Article |
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| institution | OA Journals |
| issn | 2637-9368 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Carbon Energy |
| spelling | doaj-art-e2f6772557a64ebba6bf38dbc7a0e33c2025-08-20T02:11:08ZengWileyCarbon Energy2637-93682024-10-01610n/an/a10.1002/cey2.560Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storageRu‐Ning Tian0Siwei Zhao1Zhuoran Lv2Guozhong Lu3Mengnuo Fu4Jingjing Chen5Dajian Wang6Chenlong Dong7Zhiyong Mao8Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaState Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering Peking University Beijing ChinaState Key Laboratory of High‐Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai ChinaShanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science East China Normal University Shanghai ChinaTianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaTianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaTianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaTianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaTianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering Tianjin University of Technology Tianjin ChinaAbstract Developing high‐capacity and high‐rate anodes is significant to engineering sodium‐ion batteries with high energy density and high power density. Layered Na2Ti3O7 (NTO), with an open crystal structure, large theoretical capacity, and low working potential, is recognized as one of the prospective anodes for sodium storage. Nevertheless, it suffers from sluggish sodiation kinetics and low (micro)structure stability triggered by a high Na+ diffusion barrier and weak adhesion of [Ti3O7] slabs. Herein, the interlayered local structure of NTO is regulated to solve the above issues, in which parts of interlayered Na+ sites are substituted by H+ (Na2−xHxTi3O7 [NHTO]). Theoretical calculations prove that the NHTO offers lower activation energy for Na+ transports and low interlayer spacings with alleviated Na–Na repulsion and relatively flexible [Ti3O7] slabs to reduce fractural stress. In situ and ex situ characterizations of (micro)structure evolution reveal that NHTO goes through transformation between H‐rich and Na‐rich phases, resulting in high structure stability and microstructure integrity. The optimal NHTO anode delivers a high capacity of 190.6 mA h g−1 at 0.5 C after 300 cycles and a superior high‐rate stability of 90.6 mA h g−1 at 50 C over 10,000 cycles at room temperature. Besides, it offers a capacity of 50.3 mA h g−1 after 1800 cycles at a low temperature of −20°C and 195.7 mA h g−1 after 500 cycles at a high temperature of 40°C at 0.5 C. The developed topologically interlayered local structure regulation strategy would raise the prospect of designing high‐performance layered anodes.https://doi.org/10.1002/cey2.560local structure regulationmicrostructure evolutionsodium storagesodium titanitewide temperature |
| spellingShingle | Ru‐Ning Tian Siwei Zhao Zhuoran Lv Guozhong Lu Mengnuo Fu Jingjing Chen Dajian Wang Chenlong Dong Zhiyong Mao Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage Carbon Energy local structure regulation microstructure evolution sodium storage sodium titanite wide temperature |
| title | Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage |
| title_full | Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage |
| title_fullStr | Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage |
| title_full_unstemmed | Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage |
| title_short | Topological proton regulation of interlayered local structure in sodium titanite for wide‐temperature sodium storage |
| title_sort | topological proton regulation of interlayered local structure in sodium titanite for wide temperature sodium storage |
| topic | local structure regulation microstructure evolution sodium storage sodium titanite wide temperature |
| url | https://doi.org/10.1002/cey2.560 |
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