Direct observation of Mn and Ni ordering in LiMn1.5Ni0.5O4 using atomic resolution scanning transmission electron microscopy

Ryosuke Okamoto; Kazuhide Hayashi; Satoshi Matsumoto; Naomi Suzuki; Masami Terauchi; Kenji Tsuda

doi:10.1093/jmicro/dfy034

Direct observation of Mn and Ni ordering in LiMn_1.5Ni_0.5O₄ using atomic resolution scanning transmission electron microscopy

Ryosuke Okamoto, Kazuhide Hayashi, Satoshi Matsumoto, Naomi Suzuki, Masami Terauchi, Kenji Tsuda

IMRAM - Division of Measurements

Sumitomo Metal Mining Co., Ltd.

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

1 Citation (Scopus)

Abstract

LiMn_1.5Ni_0.5O₄ is an excellent candidate as a cathode-active material in high-voltage lithium-ion batteries and studied using atomic resolution scanning transmission electron microscope. High-angle annular dark-field (HAADF) images obtained at [100] orientation demonstrate that Mn and Ni atoms are regularly ordered at octahedral sites in a spinel structure, in a 3:1 ratio between columns with high and low intensities. Simulations of HAADF images revealed that atomic columns including Mn exhibit a larger intensity than that by Ni columns, primarily because of the effect of the Debye- Waller factor.

Original language	English
Pages (from-to)	280-285
Number of pages	6
Journal	Microscopy (Oxford, England)
Volume	67
Issue number	5
DOIs	https://doi.org/10.1093/jmicro/dfy034
Publication status	Published - 2018 Oct 1

Keywords

Debye-Waller factor
High-angle annular dark-field image
LiMnNiO
Lithium-ion battery
Mn and Ni ordering
Scanning transmission electron microscopy

UN SDGs

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

Access to Document

10.1093/jmicro/dfy034

Cite this

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abstract = "LiMn1.5Ni0.5O4 is an excellent candidate as a cathode-active material in high-voltage lithium-ion batteries and studied using atomic resolution scanning transmission electron microscope. High-angle annular dark-field (HAADF) images obtained at [100] orientation demonstrate that Mn and Ni atoms are regularly ordered at octahedral sites in a spinel structure, in a 3:1 ratio between columns with high and low intensities. Simulations of HAADF images revealed that atomic columns including Mn exhibit a larger intensity than that by Ni columns, primarily because of the effect of the Debye- Waller factor.",

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T1 - Direct observation of Mn and Ni ordering in LiMn1.5Ni0.5O4 using atomic resolution scanning transmission electron microscopy

AU - Okamoto, Ryosuke

AU - Hayashi, Kazuhide

AU - Matsumoto, Satoshi

AU - Suzuki, Naomi

AU - Terauchi, Masami

AU - Tsuda, Kenji

PY - 2018/10/1

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AB - LiMn1.5Ni0.5O4 is an excellent candidate as a cathode-active material in high-voltage lithium-ion batteries and studied using atomic resolution scanning transmission electron microscope. High-angle annular dark-field (HAADF) images obtained at [100] orientation demonstrate that Mn and Ni atoms are regularly ordered at octahedral sites in a spinel structure, in a 3:1 ratio between columns with high and low intensities. Simulations of HAADF images revealed that atomic columns including Mn exhibit a larger intensity than that by Ni columns, primarily because of the effect of the Debye- Waller factor.

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KW - High-angle annular dark-field image

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