Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides | |
A. Zeng, J. Jiao, H. Zhang, E. Zhao, T. He, Z. Xu and X. Xiao | |
2024 | |
发表期刊 | ACS Applied Materials and Interfaces
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ISSN | 19448244 |
卷号 | 16期号:6页码:7119-7129 |
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. |
DOI | 10.1021/acsami.3c16320 |
URL | 查看原文 |
收录类别 | ei |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | 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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