NDLI: Hydrothermal synthesis and electrochemical performance studies of Al$_{2}$O$_{3}$-coated LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$

Content Provider	SpringerLink
Author	Li, Xueliang He, Wenxiang Chen, Li Guo, Wei Chen, Jiejie Xiao, Zhenghui
Copyright Year	2013
Abstract	LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$_{2}$ nanocrystallites were synthesized by a one-step hydrothermal method, and uniform second particles were formed by a subsequent calcination process. X-ray diffraction results indicate that the as-synthesized material can be indexed by α-NaFeO$_{2}$ layered structure with R-3 m space group. The results of Rietveld refinements show the I $_{003}$/I $_{104}$ value of the material is 2.032, and the nanostructured material presents low cation mixing, small cell volume, and a consequent suppression of lattice strain. The rate performances of the as-synthesized material can be further improved by coating Al$_{2}$O$_{3}$. The discharging capacity of Al$_{2}$O$_{3}$-coated material reaches 154.4 mAh g$^{−1}$, and the capacity retention maintains 80.3 % after 50 cycles at 5 C in the voltage range of 2.5 to 4.5 V, while those of the bare one is only 139.0 mAh g$^{−1}$ and 71.6 %, respectively. The transmission electron microcopy observation shows no zigzag layer exists on the surface of particle after cycles for Al$_{2}$O$_{3}$-coated LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$_{2}$. Compared to bare LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$_{2}$, the de-intercalation potential difference before and after cycles of Al$_{2}$O$_{3}$-coated one is smaller. This indicates that Al$_{2}$O$_{3}$ coating can reduce the electrochemistry polarization in the electrode bulk.
Starting Page	833
Ending Page	840
Page Count	8
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	20
Issue Number	6
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-12-13
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Cathode material LiNi$_{1/3}$Co$_{1/3}$Mn$_{1/3}$O$_{2}$ Hydrothermal Al$_{2}$O$_{3}$ coating Electrode process Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Chemical Engineering Materials Science

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