NDLI: Atomic Insights into Ti Doping on the Stability Enhancement of Truncated Octahedron $LiMn_{2}O_{4}$ Nanoparticles

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Atomic Insights into Ti Doping on the Stability Enhancement of Truncated Octahedron $LiMn_{2}O_{4}$ Nanoparticles

Content Provider	MDPI
Author	HeChun, Lin Xu, Wangqiong Li, Hongkai Zheng, Yonghui Lei, Weibin Wang, Zhenguo Cheng, Yan Qi, Ruijuan Peng, Hui Yue, Fangyu Huang, Rong
Copyright Year	2021
Description	Ti-doped truncated octahedron LiTi x Mn2-x O4 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 LiTi x Mn2−x O4 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 LiTi x Mn2−x O4 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.
Starting Page	508
e-ISSN	20794991
DOI	10.3390/nano11020508
Journal	Nanomaterials
Issue Number	2
Volume Number	11
Language	English
Publisher	MDPI
Publisher Date	2021-02-17
Access Restriction	Open
Subject Keyword	Nanomaterials Electrochemistry Truncated Octahedral Limn2o4 Ti Doping Crystal Planes Cathode Materials Li-ion Batteries
Content Type	Text
Resource Type	Article

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