Surface modification of LiMn2O4 thin films at elevated temperature

Dong Shu; Gopu Kumar; Kwang Bum Kim; Kwang Sun Ryu; Soon Ho Chang

doi:10.1016/S0167-2738(03)00190-5

Surface modification of LiMn₂O₄ thin films at elevated temperature

Dong Shu, Gopu Kumar, Kwang Bum Kim, Kwang Sun Ryu, Soon Ho Chang

Department of Materials Science and Engineering

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

37 Citations (Scopus)

Abstract

In order to improve the cycle stability of spinel LiMn₂O₄ electrode at elevated temperature, the LiCoO₂-coated and Co-doped LiMn₂O₄ film were prepared by an electrostatic spray deposition (ESD) technique. LiCoO₂-coated LiMn₂O₄ film shows excellent cycling stability at 55 °C compared to pristine and Co-doped LiMn₂O₄ films. The samples were studied by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The excellent performance of LiCoO₂-coated LiMn₂O₄ film can be explained by suppression of Mn dissolution. On the other hand, the LiCoO₂-layer on the LiMn₂O₄ surface allows a homogenous Li⁺ insertion/extraction during electrochemical cycles and improves its structure stability.

Original language	English
Pages (from-to)	227-233
Number of pages	7
Journal	Solid State Ionics
Volume	160
Issue number	3-4
DOIs	https://doi.org/10.1016/S0167-2738(03)00190-5
Publication status	Published - 2003 Jun

Bibliographical note

Funding Information:
This work was supported by the Ministry of Informtion and Communication (MIC) in Korea (2002-S-103).

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Surface modification of LiMn2O4 thin films at elevated temperature",

abstract = "In order to improve the cycle stability of spinel LiMn2O4 electrode at elevated temperature, the LiCoO2-coated and Co-doped LiMn2O4 film were prepared by an electrostatic spray deposition (ESD) technique. LiCoO2-coated LiMn2O4 film shows excellent cycling stability at 55 °C compared to pristine and Co-doped LiMn2O4 films. The samples were studied by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The excellent performance of LiCoO2-coated LiMn2O4 film can be explained by suppression of Mn dissolution. On the other hand, the LiCoO2-layer on the LiMn2O4 surface allows a homogenous Li+ insertion/extraction during electrochemical cycles and improves its structure stability.",

author = "Dong Shu and Gopu Kumar and Kim, {Kwang Bum} and Ryu, {Kwang Sun} and Chang, {Soon Ho}",

note = "Funding Information: This work was supported by the Ministry of Informtion and Communication (MIC) in Korea (2002-S-103).",

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T1 - Surface modification of LiMn2O4 thin films at elevated temperature

AU - Shu, Dong

AU - Kumar, Gopu

AU - Kim, Kwang Bum

AU - Ryu, Kwang Sun

AU - Chang, Soon Ho

N1 - Funding Information: This work was supported by the Ministry of Informtion and Communication (MIC) in Korea (2002-S-103).

PY - 2003/6

Y1 - 2003/6

N2 - In order to improve the cycle stability of spinel LiMn2O4 electrode at elevated temperature, the LiCoO2-coated and Co-doped LiMn2O4 film were prepared by an electrostatic spray deposition (ESD) technique. LiCoO2-coated LiMn2O4 film shows excellent cycling stability at 55 °C compared to pristine and Co-doped LiMn2O4 films. The samples were studied by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The excellent performance of LiCoO2-coated LiMn2O4 film can be explained by suppression of Mn dissolution. On the other hand, the LiCoO2-layer on the LiMn2O4 surface allows a homogenous Li+ insertion/extraction during electrochemical cycles and improves its structure stability.

AB - In order to improve the cycle stability of spinel LiMn2O4 electrode at elevated temperature, the LiCoO2-coated and Co-doped LiMn2O4 film were prepared by an electrostatic spray deposition (ESD) technique. LiCoO2-coated LiMn2O4 film shows excellent cycling stability at 55 °C compared to pristine and Co-doped LiMn2O4 films. The samples were studied by X-ray diffraction, scanning electron microscopy, Auger electron spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The excellent performance of LiCoO2-coated LiMn2O4 film can be explained by suppression of Mn dissolution. On the other hand, the LiCoO2-layer on the LiMn2O4 surface allows a homogenous Li+ insertion/extraction during electrochemical cycles and improves its structure stability.

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