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 | |
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