Surface modification of LiMn2O4 thin films at elevated temperature

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

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38 Citations (Scopus)


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 languageEnglish
Pages (from-to)227-233
Number of pages7
JournalSolid State Ionics
Issue number3-4
Publication statusPublished - 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

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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