Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries
Abstract Na-birnessite is a promising low-cost positive electrode material for aqueous sodium-ion batteries. However, its sodium storage capability is limited by narrow potential window and low redox activity in aqueous electrolytes. Herein, a Na-rich birnessite (NaMnO2•0.1H2O) with a highly ordered...
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| Format: | Article |
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Nature Portfolio
2025-04-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-59223-1 |
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| author | Xiaohui Zhu Jing Xu Qinghua Zhang Tao Shen Yuhang Zhuang Tingting Chen Shuang Li Lin Gu Hui Xia |
| author_facet | Xiaohui Zhu Jing Xu Qinghua Zhang Tao Shen Yuhang Zhuang Tingting Chen Shuang Li Lin Gu Hui Xia |
| author_sort | Xiaohui Zhu |
| collection | DOAJ |
| description | Abstract Na-birnessite is a promising low-cost positive electrode material for aqueous sodium-ion batteries. However, its sodium storage capability is limited by narrow potential window and low redox activity in aqueous electrolytes. Herein, a Na-rich birnessite (NaMnO2•0.1H2O) with a highly ordered layered structure is reported as an advanced positive electrode for aqueous sodium-ion batteries, greatly suppressing Mn migration and its accompanying domino degradation effect, which enables a promoted upper charging cut-off potential up to 1.4 V (vs. Ag/AgCl), an enhanced specific capacity of 199.9 mAh g−1 at a specific current of 0.2 A g− 1 based on the mass of active material for positive electrode, and greatly improved structural stability. In particular, a 3.0 V Na x H2–x Ti2O5||NaMnO2•0.1H2O aqueous full cell prototype is validated, exhibiting a large specific energy of 117.1 Wh kg− 1 based on the total mass of active materials in both positive and negative electrodes as well as a long cycle life. This work elucidates how interlayer chemistry and structural defects influence sodium ion storage in layered structures and provides opportunities for developing high-voltage aqueous batteries with large specific energy. |
| format | Article |
| id | doaj-art-b0ce38cab2a94a16ad503d9623f17ddd |
| institution | OA Journals |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
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| series | Nature Communications |
| spelling | doaj-art-b0ce38cab2a94a16ad503d9623f17ddd2025-08-20T02:20:25ZengNature PortfolioNature Communications2041-17232025-04-0116111310.1038/s41467-025-59223-1Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteriesXiaohui Zhu0Jing Xu1Qinghua Zhang2Tao Shen3Yuhang Zhuang4Tingting Chen5Shuang Li6Lin Gu7Hui Xia8School of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologyBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of SciencesSchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Tsinghua UniversitySchool of Materials Science and Engineering, Nanjing University of Science and TechnologyAbstract Na-birnessite is a promising low-cost positive electrode material for aqueous sodium-ion batteries. However, its sodium storage capability is limited by narrow potential window and low redox activity in aqueous electrolytes. Herein, a Na-rich birnessite (NaMnO2•0.1H2O) with a highly ordered layered structure is reported as an advanced positive electrode for aqueous sodium-ion batteries, greatly suppressing Mn migration and its accompanying domino degradation effect, which enables a promoted upper charging cut-off potential up to 1.4 V (vs. Ag/AgCl), an enhanced specific capacity of 199.9 mAh g−1 at a specific current of 0.2 A g− 1 based on the mass of active material for positive electrode, and greatly improved structural stability. In particular, a 3.0 V Na x H2–x Ti2O5||NaMnO2•0.1H2O aqueous full cell prototype is validated, exhibiting a large specific energy of 117.1 Wh kg− 1 based on the total mass of active materials in both positive and negative electrodes as well as a long cycle life. This work elucidates how interlayer chemistry and structural defects influence sodium ion storage in layered structures and provides opportunities for developing high-voltage aqueous batteries with large specific energy.https://doi.org/10.1038/s41467-025-59223-1 |
| spellingShingle | Xiaohui Zhu Jing Xu Qinghua Zhang Tao Shen Yuhang Zhuang Tingting Chen Shuang Li Lin Gu Hui Xia Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries Nature Communications |
| title | Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries |
| title_full | Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries |
| title_fullStr | Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries |
| title_full_unstemmed | Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries |
| title_short | Regulating Na content and Mn defects in birnessite for high-voltage aqueous sodium-ion batteries |
| title_sort | regulating na content and mn defects in birnessite for high voltage aqueous sodium ion batteries |
| url | https://doi.org/10.1038/s41467-025-59223-1 |
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