Atomic insights into ti doping on the stability enhancement of truncated octahedron LiMn2O4 nanoparticles

Wangqiong Xu; Hongkai Li; Yonghui Zheng; Weibin Lei; Zhenguo Wang; Yan Cheng; Ruijuan Qi; Hui Peng; Hechun Lin; Fangyu Yue; Rong Huang

doi:10.3390/nano11020508

Atomic insights into ti doping on the stability enhancement of truncated octahedron LiMn₂O₄ nanoparticles

Wangqiong Xu
, Hongkai Li
, Yonghui Zheng
, Weibin Lei
, Zhenguo Wang
, Yan Cheng
, Ruijuan Qi^*
, Hui Peng
, Hechun Lin
, Fangyu Yue
, Rong Huang^*

^*Corresponding author for this work

School of Physics and Electronic Science

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

33 Scopus citations

Abstract

Ti‐doped truncated octahedron LiTixMn2‐xO4 nanocomposites were synthesized through a facile hydrothermal treatment and calcination process. By using spherical aberration‐corrected scanning transmission electron microscopy (Cs‐STEM), the effects of Ti‐doping on the structure evolution and stability enhancement of LiMn2O4 are revealed. It is found that truncated octahedrons are easily formed in Ti doping LiMn2O4 material. Structural characterizations reveal that most of the Ti⁴⁺ ions are composed into the spinel to form a more stable spinel LiTixMn2−xO4 phase framework in bulk. However, a portion of Ti⁴⁺ ions occupy 8a sites around the {001} plane surface to form a new TiMn2O4‐like structure. The combination of LiTixMn2−xO4 frameworks in bulk and the TiMn2O4‐like structure at the surface may enhance the stability of the spinel LiMn2O4. Our findings demonstrate the critical role of Ti doping in the surface chemical and structural evolution of LiMn2O4 and may guide the design principle for viable electrode materials.

Original language	English
Article number	508
Pages (from-to)	1-12
Number of pages	12
Journal	Nanomaterials
Volume	11
Issue number	2
DOIs	https://doi.org/10.3390/nano11020508
State	Published - Feb 2021

Keywords

Cathode materials
Crystal planes
Li‐ion batteries
Ti doping
Truncated octahedral LiMnO

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10.3390/nano11020508

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title = "Atomic insights into ti doping on the stability enhancement of truncated octahedron LiMn2O4 nanoparticles",

abstract = "Ti‐doped truncated octahedron LiTixMn2‐xO4 nanocomposites were synthesized through a facile hydrothermal treatment and calcination process. By using spherical aberration‐corrected scanning transmission electron microscopy (Cs‐STEM), the effects of Ti‐doping on the structure evolution and stability enhancement of LiMn2O4 are revealed. It is found that truncated octahedrons are easily formed in Ti doping LiMn2O4 material. Structural characterizations reveal that most of the Ti4+ ions are composed into the spinel to form a more stable spinel LiTixMn2−xO4 phase framework in bulk. However, a portion of Ti4+ ions occupy 8a sites around the \{001\} plane surface to form a new TiMn2O4‐like structure. The combination of LiTixMn2−xO4 frameworks in bulk and the TiMn2O4‐like structure at the surface may enhance the stability of the spinel LiMn2O4. Our findings demonstrate the critical role of Ti doping in the surface chemical and structural evolution of LiMn2O4 and may guide the design principle for viable electrode materials.",

keywords = "Cathode materials, Crystal planes, Li‐ion batteries, Ti doping, Truncated octahedral LiMnO",

author = "Wangqiong Xu and Hongkai Li and Yonghui Zheng and Weibin Lei and Zhenguo Wang and Yan Cheng and Ruijuan Qi and Hui Peng and Hechun Lin and Fangyu Yue and Rong Huang",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

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doi = "10.3390/nano11020508",

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T1 - Atomic insights into ti doping on the stability enhancement of truncated octahedron LiMn2O4 nanoparticles

AU - Xu, Wangqiong

AU - Li, Hongkai

AU - Zheng, Yonghui

AU - Lei, Weibin

AU - Wang, Zhenguo

AU - Cheng, Yan

AU - Qi, Ruijuan

AU - Peng, Hui

AU - Lin, Hechun

AU - Yue, Fangyu

AU - Huang, Rong

PY - 2021/2

Y1 - 2021/2

N2 - Ti‐doped truncated octahedron LiTixMn2‐xO4 nanocomposites were synthesized through a facile hydrothermal treatment and calcination process. By using spherical aberration‐corrected scanning transmission electron microscopy (Cs‐STEM), the effects of Ti‐doping on the structure evolution and stability enhancement of LiMn2O4 are revealed. It is found that truncated octahedrons are easily formed in Ti doping LiMn2O4 material. Structural characterizations reveal that most of the Ti4+ ions are composed into the spinel to form a more stable spinel LiTixMn2−xO4 phase framework in bulk. However, a portion of Ti4+ ions occupy 8a sites around the {001} plane surface to form a new TiMn2O4‐like structure. The combination of LiTixMn2−xO4 frameworks in bulk and the TiMn2O4‐like structure at the surface may enhance the stability of the spinel LiMn2O4. Our findings demonstrate the critical role of Ti doping in the surface chemical and structural evolution of LiMn2O4 and may guide the design principle for viable electrode materials.

AB - Ti‐doped truncated octahedron LiTixMn2‐xO4 nanocomposites were synthesized through a facile hydrothermal treatment and calcination process. By using spherical aberration‐corrected scanning transmission electron microscopy (Cs‐STEM), the effects of Ti‐doping on the structure evolution and stability enhancement of LiMn2O4 are revealed. It is found that truncated octahedrons are easily formed in Ti doping LiMn2O4 material. Structural characterizations reveal that most of the Ti4+ ions are composed into the spinel to form a more stable spinel LiTixMn2−xO4 phase framework in bulk. However, a portion of Ti4+ ions occupy 8a sites around the {001} plane surface to form a new TiMn2O4‐like structure. The combination of LiTixMn2−xO4 frameworks in bulk and the TiMn2O4‐like structure at the surface may enhance the stability of the spinel LiMn2O4. Our findings demonstrate the critical role of Ti doping in the surface chemical and structural evolution of LiMn2O4 and may guide the design principle for viable electrode materials.

KW - Cathode materials

KW - Crystal planes

KW - Li‐ion batteries

KW - Ti doping

KW - Truncated octahedral LiMnO

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DO - 10.3390/nano11020508

M3 - 文章

AN - SCOPUS:85101094184

SN - 2079-4991

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SP - 1

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JO - Nanomaterials

JF - Nanomaterials

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M1 - 508

ER -

Atomic insights into ti doping on the stability enhancement of truncated octahedron LiMn₂O₄ nanoparticles

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