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  Eliminating Transition Metal Migration and Anionic Redox to Understand Voltage Hysteresis of Lithium-Rich Layered Oxides

Han, M., Jiao, J., Liu, Z., Shen, X., Zhang, Q., Lin, H.-J., et al. (2020). Eliminating Transition Metal Migration and Anionic Redox to Understand Voltage Hysteresis of Lithium-Rich Layered Oxides. Advanced Energy Materials, 1903634, pp. 1-9. doi:10.1002/aenm.201903634.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-9EA2-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-9EA3-1
Genre: Journal Article

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 Creators:
Han, Miao1, Author
Jiao, Junyu1, Author
Liu, Zepeng1, Author
Shen, Xi1, Author
Zhang, Qinghua1, Author
Lin, Hong-Ji1, Author
Chen, Chien-Te1, Author
Kong, Qingyu1, Author
Pang, Wei Kong1, Author
Guo, Zaiping1, Author
Yu, Richeng1, Author
Gu, Lin1, Author
Hu, Zhiwei2, Author              
Wang, Zhaoxiang1, Author
Chen, Liquan1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863461              

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 Abstract: Lithium-rich layered oxides are promising candidate cathode materials for the Li-ion batteries with energy densities above 300 Wh kg(-1). However, issues such as the voltage hysteresis and decay hinder their commercial applications. Due to the entanglement of the transition metal (TM) migration and the anionic redox upon lithium extraction at high potentials, it is difficult to recognize the origin of these issues in conventional Li-rich layered oxides. Herein, Li2MoO3 is chosen since prototype material to uncover the reason for the voltage hysteresis as the TM migration and anionic redox can be eliminated below 3.6 V versus Li+/Li in this material. On the basis of comprehensive investigations by neutron powder diffraction, scanning transmission electron microscopy, synchrotron X-ray absorption spectroscopy, and density functional theory calculations, it is clarified that the ordering-disordering transformation of the Mo3O13 clusters induced by the intralayer Mo migration is responsible for the voltage hysteresis in the first cycle; the hysteresis can take place even without the anionic redox or the interlayer Mo migration. A similar suggestion is drawn for its iso-structured Li2RuO3 (C2/c). These findings are useful for understanding of the voltage hysteresis in other complicated Li-rich layered oxides.

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Language(s): eng - English
 Dates: 2020-01-122020-01-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000509824200001
DOI: 10.1002/aenm.201903634
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Title: Advanced Energy Materials
  Abbreviation : Adv. Energy Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 1903634 Start / End Page: 1 - 9 Identifier: ISSN: 1614-6832
CoNE: https://pure.mpg.de/cone/journals/resource/1614-6832