Slow-Released Cationic Redox Activity Promoted Stable Anionic Redox and Suppressed Jahn-Teller Distortion in Layered Sodium Manganese Oxides

doi:10.1021/acsami.3c16320

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	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
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
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收录类别	ei
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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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