Superstructure Variation and Improved Cycling of Anion Redox Active Sodium Manganese Oxides Due to Doping by Iron

Xiaodong Qi; Langyuan Wu; Zhiwei Li; Yuxuan Xiang; Yunan Liu; Kangsheng Huang; Elias Yuval; Doron Aurbach; Xiaogang Zhang

doi:10.1002/aenm.202202355

Superstructure Variation and Improved Cycling of Anion Redox Active Sodium Manganese Oxides Due to Doping by Iron

Xiaodong Qi, Langyuan Wu, Zhiwei Li, Yuxuan Xiang, Yunan Liu, Kangsheng Huang, Elias Yuval, Doron Aurbach, Xiaogang Zhang

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

18 Scopus citations

Abstract

Anionic redox provides an effective way to overcome the capacity bottleneck of sodium-ion batteries. A dominant role is played by the arrangement of alkali A and transition metal M in the Na_xA_yM_1-yO₂ superstructure. Here, in situ X-ray diffraction and ex situ ⁷Li nuclear magnetic resonance of P2 type Na_0.6Li_0.2Mn_0.8O₂ with ribbon-ordered superstructure illustrate structural changes and explain the evolution of the electrochemical behavior of electrodes comprising this active mass, during cycling. Upon substitution of a small amount of manganese by iron, Na_0.67Li_0.2Mn_0.73Fe_0.07O₂ is formed with a honeycomb-ordered superstructure. Experimental characterizations and theoretical calculations elucidate the effect of iron on oxygen redox activity. The iron-doped material considerably outperforms the undoped Na_0.6Li_0.2Mn_0.8O₂ as a cathode material for rechargeable Na-ion batteries. This research reveals the effect of superstructure transformation on the electrochemical properties and offers a new perspective on element substitution in anionic redox active cathode materials.

Original language	English
Article number	2202355
Journal	Advanced Energy Materials
Volume	12
Issue number	43
DOIs	https://doi.org/10.1002/aenm.202202355
State	Published - 17 Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Funding

This work was supported by the National Natural Science Foundation of China (U1802256, 21773118, 21875107), Free Exploration Basic Research Project in Shenzhen Virtual University Park (2021Szvup062), Research and Practice Innovation Program in Nanjing University of Aeronautics and Astronautics (xcxjh20210603) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

Funders	Funder number
Free Exploration Basic Research Project in Shenzhen Virtual University	2021Szvup062
National Natural Science Foundation of China	21773118, U1802256, 21875107
Nanjing University of Aeronautics and Astronautics	xcxjh20210603
Priority Academic Program Development of Jiangsu Higher Education Institutions

Keywords

cycling performance
layered oxides
oxygen redox
sodium-ion batteries
superstructures

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/aenm.202202355

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abstract = "Anionic redox provides an effective way to overcome the capacity bottleneck of sodium-ion batteries. A dominant role is played by the arrangement of alkali A and transition metal M in the NaxAyM1-yO2 superstructure. Here, in situ X-ray diffraction and ex situ 7Li nuclear magnetic resonance of P2 type Na0.6Li0.2Mn0.8O2 with ribbon-ordered superstructure illustrate structural changes and explain the evolution of the electrochemical behavior of electrodes comprising this active mass, during cycling. Upon substitution of a small amount of manganese by iron, Na0.67Li0.2Mn0.73Fe0.07O2 is formed with a honeycomb-ordered superstructure. Experimental characterizations and theoretical calculations elucidate the effect of iron on oxygen redox activity. The iron-doped material considerably outperforms the undoped Na0.6Li0.2Mn0.8O2 as a cathode material for rechargeable Na-ion batteries. This research reveals the effect of superstructure transformation on the electrochemical properties and offers a new perspective on element substitution in anionic redox active cathode materials.",

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AU - Li, Zhiwei

AU - Xiang, Yuxuan

AU - Liu, Yunan

AU - Huang, Kangsheng

AU - Yuval, Elias

AU - Aurbach, Doron

AU - Zhang, Xiaogang

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N2 - Anionic redox provides an effective way to overcome the capacity bottleneck of sodium-ion batteries. A dominant role is played by the arrangement of alkali A and transition metal M in the NaxAyM1-yO2 superstructure. Here, in situ X-ray diffraction and ex situ 7Li nuclear magnetic resonance of P2 type Na0.6Li0.2Mn0.8O2 with ribbon-ordered superstructure illustrate structural changes and explain the evolution of the electrochemical behavior of electrodes comprising this active mass, during cycling. Upon substitution of a small amount of manganese by iron, Na0.67Li0.2Mn0.73Fe0.07O2 is formed with a honeycomb-ordered superstructure. Experimental characterizations and theoretical calculations elucidate the effect of iron on oxygen redox activity. The iron-doped material considerably outperforms the undoped Na0.6Li0.2Mn0.8O2 as a cathode material for rechargeable Na-ion batteries. This research reveals the effect of superstructure transformation on the electrochemical properties and offers a new perspective on element substitution in anionic redox active cathode materials.

AB - Anionic redox provides an effective way to overcome the capacity bottleneck of sodium-ion batteries. A dominant role is played by the arrangement of alkali A and transition metal M in the NaxAyM1-yO2 superstructure. Here, in situ X-ray diffraction and ex situ 7Li nuclear magnetic resonance of P2 type Na0.6Li0.2Mn0.8O2 with ribbon-ordered superstructure illustrate structural changes and explain the evolution of the electrochemical behavior of electrodes comprising this active mass, during cycling. Upon substitution of a small amount of manganese by iron, Na0.67Li0.2Mn0.73Fe0.07O2 is formed with a honeycomb-ordered superstructure. Experimental characterizations and theoretical calculations elucidate the effect of iron on oxygen redox activity. The iron-doped material considerably outperforms the undoped Na0.6Li0.2Mn0.8O2 as a cathode material for rechargeable Na-ion batteries. This research reveals the effect of superstructure transformation on the electrochemical properties and offers a new perspective on element substitution in anionic redox active cathode materials.

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Superstructure Variation and Improved Cycling of Anion Redox Active Sodium Manganese Oxides Due to Doping by Iron

Abstract

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Keywords

UN SDGs

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