Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides
文献类型：期刊论文
| 作者 | A. Zeng, J. Jiao, H. Zhang, E. Zhao, T. He, Z. Xu and X. Xiao |
| 刊名 | ACS Applied Materials and Interfaces
 |
| 出版日期 | 2024 |
| 卷号 | 16期号:6页码:7119-7129 |
| ISSN号 | 19448244 |
| DOI | 10.1021/acsami.3c16320 |
| 英文摘要 | Manganese-based layered oxides are considered promising cathodes for sodium ion batteries due to their high capacity and low-cost manganese and sodium resources. Triggering the anionic redox reaction (ARR) can exceed the capacity limitation determined by conventional cationic redox. However, the unstable ARR charge compensation and Jahn-Teller distortion of Mn3+ ions readily result in structural degradation and rapid capacity fade. Here, we report a P2-type Na0.8Li0.2Mn0.7Cu0.1O2 cathode that shows a capacity retention of 84.5% at 200 mA/g after 200 cycles. Combining in situ X-ray diffraction and multi other ex situ characterizations, we reveal that the enhanced cycling stability is ascribed to a slow release of cationic redox activity which can well suppress the Jahn-Teller distortion and favor the ARR reversibility. Furthermore, density-functional theory calculations demonstrate that the inhibited interlayer migration and reduced band gap facilitate the stability and kinetic behavior of ARR. These findings provide a perspective for designing high-energy-density cathode materials with ARR activity. © 2024 American Chemical Society. |
| URL标识 | 查看原文 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/68141]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | A. Zeng, J. Jiao, H. Zhang, E. Zhao, T. He, Z. Xu and X. Xiao. Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides[J]. ACS Applied Materials and Interfaces,2024,16(6):7119-7129. |
| APA | A. Zeng, J. Jiao, H. Zhang, E. Zhao, T. He, Z. Xu and X. Xiao.(2024).Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides.ACS Applied Materials and Interfaces,16(6),7119-7129. |
| MLA | A. Zeng, J. Jiao, H. Zhang, E. Zhao, T. He, Z. Xu and X. Xiao."Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides".ACS Applied Materials and Interfaces 16.6(2024):7119-7129. |
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