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

113 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

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Li-ion battery
Mn dissolution

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\}",

year = "2012",

month = jun,

day = "1",

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

language = "English",

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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

UR - https://www.scopus.com/pages/publications/84860433237

U2 - 10.1016/j.electacta.2012.03.090

DO - 10.1016/j.electacta.2012.03.090

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