The stability of P2-layered sodium transition metal oxides in ambient atmospheres

Wenhua Zuo; Jimin Qiu; Xiangsi Liu; Fucheng Ren; Haodong Liu; Huajin He; Chong Luo; Jialin Li; Gregorio F. Ortiz; Huanan Duan; Jinping Liu; Ming Sheng Wang; Yangxing Li; Riqiang Fu; Yong Yang

doi:10.1038/s41467-020-17290-6

The stability of P2-layered sodium transition metal oxides in ambient atmospheres

Wenhua Zuo
, Jimin Qiu
, Xiangsi Liu
, Fucheng Ren
, Haodong Liu
, Huajin He
, Chong Luo
, Jialin Li
, Gregorio F. Ortiz
, Huanan Duan
, Jinping Liu^*
, Ming Sheng Wang
, Yangxing Li
, Riqiang Fu
, Yong Yang^*

^*Corresponding author for this work

Xiamen University
University of California at San Diego
University of Córdoba
Shanghai Jiao Tong University
Wuhan University of Technology
National High Magnetic Field Laboratory

Research output: Contribution to journal › Article › peer-review

428 Citations (Scopus)

Abstract

Air-stability is one of the most important considerations for the practical application of electrode materials in energy-harvesting/storage devices, ranging from solar cells to rechargeable batteries. The promising P2-layered sodium transition metal oxides (P2-Na_xTmO₂) often suffer from structural/chemical transformations when contacted with moist air. However, these elaborate transitions and the evaluation rules towards air-stable P2-Na_xTmO₂ have not yet been clearly elucidated. Herein, taking P2-Na_0.67MnO₂ and P2-Na_0.67Ni_0.33Mn_0.67O₂ as key examples, we unveil the comprehensive structural/chemical degradation mechanisms of P2-Na_xTmO₂ in different ambient atmospheres by using various microscopic/spectroscopic characterizations and first-principle calculations. The extent of bulk structural/chemical transformation of P2-Na_xTmO₂ is determined by the amount of extracted Na⁺, which is mainly compensated by Na⁺/H⁺ exchange. By expanding our study to a series of Mn-based oxides, we reveal that the air-stability of P2-Na_xTmO₂ is highly related to their oxidation features in the first charge process and further propose a practical evaluating rule associated with redox couples for air-stable Na_xTmO₂ cathodes.

Original language	English
Article number	3544
Journal	Nature Communications
Volume	11
Issue number	1
DOIs	https://doi.org/10.1038/s41467-020-17290-6
Publication status	Published - 1 Dec 2020
Externally published	Yes

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title = "The stability of P2-layered sodium transition metal oxides in ambient atmospheres",

abstract = "Air-stability is one of the most important considerations for the practical application of electrode materials in energy-harvesting/storage devices, ranging from solar cells to rechargeable batteries. The promising P2-layered sodium transition metal oxides (P2-NaxTmO2) often suffer from structural/chemical transformations when contacted with moist air. However, these elaborate transitions and the evaluation rules towards air-stable P2-NaxTmO2 have not yet been clearly elucidated. Herein, taking P2-Na0.67MnO2 and P2-Na0.67Ni0.33Mn0.67O2 as key examples, we unveil the comprehensive structural/chemical degradation mechanisms of P2-NaxTmO2 in different ambient atmospheres by using various microscopic/spectroscopic characterizations and first-principle calculations. The extent of bulk structural/chemical transformation of P2-NaxTmO2 is determined by the amount of extracted Na+, which is mainly compensated by Na+/H+ exchange. By expanding our study to a series of Mn-based oxides, we reveal that the air-stability of P2-NaxTmO2 is highly related to their oxidation features in the first charge process and further propose a practical evaluating rule associated with redox couples for air-stable NaxTmO2 cathodes.",

author = "Wenhua Zuo and Jimin Qiu and Xiangsi Liu and Fucheng Ren and Haodong Liu and Huajin He and Chong Luo and Jialin Li and Ortiz, \{Gregorio F.\} and Huanan Duan and Jinping Liu and Wang, \{Ming Sheng\} and Yangxing Li and Riqiang Fu and Yong Yang",

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AU - Zuo, Wenhua

AU - Qiu, Jimin

AU - Liu, Xiangsi

AU - Ren, Fucheng

AU - Liu, Haodong

AU - He, Huajin

AU - Luo, Chong

AU - Li, Jialin

AU - Ortiz, Gregorio F.

AU - Duan, Huanan

AU - Liu, Jinping

AU - Wang, Ming Sheng

AU - Li, Yangxing

AU - Fu, Riqiang

AU - Yang, Yong

PY - 2020/12/1

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N2 - Air-stability is one of the most important considerations for the practical application of electrode materials in energy-harvesting/storage devices, ranging from solar cells to rechargeable batteries. The promising P2-layered sodium transition metal oxides (P2-NaxTmO2) often suffer from structural/chemical transformations when contacted with moist air. However, these elaborate transitions and the evaluation rules towards air-stable P2-NaxTmO2 have not yet been clearly elucidated. Herein, taking P2-Na0.67MnO2 and P2-Na0.67Ni0.33Mn0.67O2 as key examples, we unveil the comprehensive structural/chemical degradation mechanisms of P2-NaxTmO2 in different ambient atmospheres by using various microscopic/spectroscopic characterizations and first-principle calculations. The extent of bulk structural/chemical transformation of P2-NaxTmO2 is determined by the amount of extracted Na+, which is mainly compensated by Na+/H+ exchange. By expanding our study to a series of Mn-based oxides, we reveal that the air-stability of P2-NaxTmO2 is highly related to their oxidation features in the first charge process and further propose a practical evaluating rule associated with redox couples for air-stable NaxTmO2 cathodes.

AB - Air-stability is one of the most important considerations for the practical application of electrode materials in energy-harvesting/storage devices, ranging from solar cells to rechargeable batteries. The promising P2-layered sodium transition metal oxides (P2-NaxTmO2) often suffer from structural/chemical transformations when contacted with moist air. However, these elaborate transitions and the evaluation rules towards air-stable P2-NaxTmO2 have not yet been clearly elucidated. Herein, taking P2-Na0.67MnO2 and P2-Na0.67Ni0.33Mn0.67O2 as key examples, we unveil the comprehensive structural/chemical degradation mechanisms of P2-NaxTmO2 in different ambient atmospheres by using various microscopic/spectroscopic characterizations and first-principle calculations. The extent of bulk structural/chemical transformation of P2-NaxTmO2 is determined by the amount of extracted Na+, which is mainly compensated by Na+/H+ exchange. By expanding our study to a series of Mn-based oxides, we reveal that the air-stability of P2-NaxTmO2 is highly related to their oxidation features in the first charge process and further propose a practical evaluating rule associated with redox couples for air-stable NaxTmO2 cathodes.

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The stability of P2-layered sodium transition metal oxides in ambient atmospheres

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