Al2O3 coating on LiMn2O4 by electrostatic attraction forces and its effects on the high temperature cyclic performance

Won Keun Kim; Dong Wook Han; Won Hee Ryu; Sung Jin Lim; Hyuk Sang Kwon

doi:10.1016/j.electacta.2012.03.090

Al₂O₃ coating on LiMn₂O₄ by electrostatic attraction forces and its effects on the high temperature cyclic performance

Won Keun Kim, Dong Wook Han, Won Hee Ryu, Sung Jin Lim, Hyuk Sang Kwon

Dept. of Future Energy Convergence

Korea Advanced Institute of Science and Technology

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

112 Scopus citations

Abstract

Bare LiMn₂O₄ was coated by a thin Al ₂O₃ layer using electrostatic attraction forces to investigate the effects of the Al₂O₃ coating on the high-temperature cyclic performance of LiMn₂O₄. Transmission electron microscopy (TEM) studies indicated that 5-nm thin and amorphous Al₂O₃ layer formed uniformly on the surface of 2 wt.% Al₂O₃ coated LiMn₂O₄. The high-temperature cyclic performance of the LiMn₂O₄ was significantly improved by the coating. From the Electrochemical Impedance Spectroscopy (EIS) and X-ray Fluorescence (XRF) analysis, the coating reduced the charge transfer resistance and inhibited the Mn dissolution. The improved electrochemical performance of the Al₂ O₃ coated LiMn ₂ O₄ was attributed to the decrease in the Mn dissolution by the coating.

Original language	English
Pages (from-to)	17-21
Number of pages	5
Journal	Electrochimica Acta
Volume	71
DOIs	https://doi.org/10.1016/j.electacta.2012.03.090
State	Published - 1 Jun 2012

Keywords

Li-ion battery
Mn dissolution

UN SDGs

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

Access to Document

10.1016/j.electacta.2012.03.090

Cite this

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title = "Al2O3 coating on LiMn2O4 by electrostatic attraction forces and its effects on the high temperature cyclic performance",

abstract = "Bare LiMn2O4 was coated by a thin Al 2O3 layer using electrostatic attraction forces to investigate the effects of the Al2O3 coating on the high-temperature cyclic performance of LiMn2O4. Transmission electron microscopy (TEM) studies indicated that 5-nm thin and amorphous Al2O3 layer formed uniformly on the surface of 2 wt.% Al2O3 coated LiMn2O4. The high-temperature cyclic performance of the LiMn2O4 was significantly improved by the coating. From the Electrochemical Impedance Spectroscopy (EIS) and X-ray Fluorescence (XRF) analysis, the coating reduced the charge transfer resistance and inhibited the Mn dissolution. The improved electrochemical performance of the Al2 O3 coated LiMn 2 O4 was attributed to the decrease in the Mn dissolution by the coating.",

keywords = "Li-ion battery, Mn dissolution",

author = "Kim, {Won Keun} and Han, {Dong Wook} and Ryu, {Won Hee} and Lim, {Sung Jin} and Kwon, {Hyuk Sang}",

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doi = "10.1016/j.electacta.2012.03.090",

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T1 - Al2O3 coating on LiMn2O4 by electrostatic attraction forces and its effects on the high temperature cyclic performance

AU - Kim, Won Keun

AU - Han, Dong Wook

AU - Ryu, Won Hee

AU - Lim, Sung Jin

AU - Kwon, Hyuk Sang

PY - 2012/6/1

Y1 - 2012/6/1

N2 - Bare LiMn2O4 was coated by a thin Al 2O3 layer using electrostatic attraction forces to investigate the effects of the Al2O3 coating on the high-temperature cyclic performance of LiMn2O4. Transmission electron microscopy (TEM) studies indicated that 5-nm thin and amorphous Al2O3 layer formed uniformly on the surface of 2 wt.% Al2O3 coated LiMn2O4. The high-temperature cyclic performance of the LiMn2O4 was significantly improved by the coating. From the Electrochemical Impedance Spectroscopy (EIS) and X-ray Fluorescence (XRF) analysis, the coating reduced the charge transfer resistance and inhibited the Mn dissolution. The improved electrochemical performance of the Al2 O3 coated LiMn 2 O4 was attributed to the decrease in the Mn dissolution by the coating.

AB - Bare LiMn2O4 was coated by a thin Al 2O3 layer using electrostatic attraction forces to investigate the effects of the Al2O3 coating on the high-temperature cyclic performance of LiMn2O4. Transmission electron microscopy (TEM) studies indicated that 5-nm thin and amorphous Al2O3 layer formed uniformly on the surface of 2 wt.% Al2O3 coated LiMn2O4. The high-temperature cyclic performance of the LiMn2O4 was significantly improved by the coating. From the Electrochemical Impedance Spectroscopy (EIS) and X-ray Fluorescence (XRF) analysis, the coating reduced the charge transfer resistance and inhibited the Mn dissolution. The improved electrochemical performance of the Al2 O3 coated LiMn 2 O4 was attributed to the decrease in the Mn dissolution by the coating.

KW - Li-ion battery

KW - Mn dissolution

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