Enhancement of thermal stability of LiCoO2 by LiMn2O4 coating
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- Enhancement of thermal stability of LiCoO2 by LiMn2O4 coating
- Cho, Jaephil; Kim, G
- Issue Date
- ELECTROCHEMICAL SOC INC
- ELECTROCHEMICAL AND SOLID STATE LETTERS, v.2, no.6, pp.253 - 255
- A significant improvement in thermal stability of the charged LiCoO2 with a particle size of 5 μm has been achieved by coating its particle surface with LiMn2O4. An onset temperature for thermal decomposition of the LiMn2O4-coated LiCoO2 prepared by heating at 800°C was 225°C, whereas that of the bare LiCoO2 is 185°C. In addition, the coating also improved the capacity retention on cycling at 4.3 V charge cut-off significantly. These results appear to indicate that the coating is effective in retarding the decomposition reaction of LiCoO2 with the electrolytes as well as sustaining its structural stability on cycling.
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