Surface modification of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 by V2O5-coating

Qiuyan Wang; Lianyi Xu; Yanli Zhang; Xiaoming Wang; Man Xie

doi:10.1016/s1875-5372(14)60070-9

Surface modification of Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6 by V₂O₅-coating

Qiuyan Wang, Lianyi Xu, Yanli Zhang, Xiaoming Wang, Man Xie^*

^*Corresponding author for this work

School of Material Science and Engineering

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

2 Citations (Scopus)

Abstract

We presented a method to improve the first discharge capacity and the cycling performance of Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6 which was synthesized by a coprecipitation-hydrothermal-calcinations method and coated by a V₂O₅ layer on the surface of Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6. The crystal structure and the charge/discharge performance of Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6 were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), inductively coupled plasma (ICP) and electrochemical performance measurement. Results show that V₂O₅ exists only on the surface, and has no effect on the crystal structure; the Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6 coated with V₂O₅ exhibits better first discharge capacity than the bared Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6. The electrochemical tests demonstrate that Li_1.6(Fe_0.2Ni_0.2 Mn_0.6)O_2.6 coated with 3 wt% V₂O₅ shows the best electrochemical performance with the discharge capacity 200.3 mAh/g after 50 cycles, while the bared sample has 194.0 mAh/g only. CV results indicate that the V₂O₅ coating can suppress the phase transitions and prevent the surface of cathode materials from the direct contact with the electrolyte.

Original language	English
Pages (from-to)	530-534
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	43
Issue number	3
DOIs	https://doi.org/10.1016/s1875-5372(14)60070-9
Publication status	Published - Mar 2014

Keywords

Lithium ion battery

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

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10.1016/s1875-5372(14)60070-9

Cite this

@article{682abbf4e86640f3a3cc02e1ca37eb95,

title = "Surface modification of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 by V2O5-coating",

abstract = "We presented a method to improve the first discharge capacity and the cycling performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 which was synthesized by a coprecipitation-hydrothermal-calcinations method and coated by a V2O5 layer on the surface of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The crystal structure and the charge/discharge performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), inductively coupled plasma (ICP) and electrochemical performance measurement. Results show that V2O5 exists only on the surface, and has no effect on the crystal structure; the Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with V2O5 exhibits better first discharge capacity than the bared Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The electrochemical tests demonstrate that Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with 3 wt% V2O5 shows the best electrochemical performance with the discharge capacity 200.3 mAh/g after 50 cycles, while the bared sample has 194.0 mAh/g only. CV results indicate that the V2O5 coating can suppress the phase transitions and prevent the surface of cathode materials from the direct contact with the electrolyte.",

keywords = "Lithium ion battery",

author = "Qiuyan Wang and Lianyi Xu and Yanli Zhang and Xiaoming Wang and Man Xie",

year = "2014",

month = mar,

doi = "10.1016/s1875-5372(14)60070-9",

language = "English",

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journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

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TY - JOUR

T1 - Surface modification of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 by V2O5-coating

AU - Wang, Qiuyan

AU - Xu, Lianyi

AU - Zhang, Yanli

AU - Wang, Xiaoming

AU - Xie, Man

PY - 2014/3

Y1 - 2014/3

N2 - We presented a method to improve the first discharge capacity and the cycling performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 which was synthesized by a coprecipitation-hydrothermal-calcinations method and coated by a V2O5 layer on the surface of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The crystal structure and the charge/discharge performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), inductively coupled plasma (ICP) and electrochemical performance measurement. Results show that V2O5 exists only on the surface, and has no effect on the crystal structure; the Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with V2O5 exhibits better first discharge capacity than the bared Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The electrochemical tests demonstrate that Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with 3 wt% V2O5 shows the best electrochemical performance with the discharge capacity 200.3 mAh/g after 50 cycles, while the bared sample has 194.0 mAh/g only. CV results indicate that the V2O5 coating can suppress the phase transitions and prevent the surface of cathode materials from the direct contact with the electrolyte.

AB - We presented a method to improve the first discharge capacity and the cycling performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 which was synthesized by a coprecipitation-hydrothermal-calcinations method and coated by a V2O5 layer on the surface of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The crystal structure and the charge/discharge performance of Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), inductively coupled plasma (ICP) and electrochemical performance measurement. Results show that V2O5 exists only on the surface, and has no effect on the crystal structure; the Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with V2O5 exhibits better first discharge capacity than the bared Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6. The electrochemical tests demonstrate that Li1.6(Fe0.2Ni0.2 Mn0.6)O2.6 coated with 3 wt% V2O5 shows the best electrochemical performance with the discharge capacity 200.3 mAh/g after 50 cycles, while the bared sample has 194.0 mAh/g only. CV results indicate that the V2O5 coating can suppress the phase transitions and prevent the surface of cathode materials from the direct contact with the electrolyte.

KW - Lithium ion battery

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