Abstract
To reduce high dissolution of manganese ions (Mn3+) into the electrolytes in lithium-ion batteries, causing severe capacity loss during storage and cycle, TiO2 is simply coated onto LiMn2O4 powders by the sol-gel method and investigated by various analytical techniques. Whereas the surface layer of TiO2 on LiMn2O4 powders is stable up to 600 °C, annealing at and above 700 °C induces the reaction of TiO2 surface layer with LiMn2O4 host particle. The passive TiO2 layer on LiMn2O4 annealed at 500 °C effectively suppress Mn dissolution at room temperature and even higher temperature (55 °C). Moreover, TiO2-coated LiMn2O4 annealed at 500 °C improves the cycle property at high voltage of 4.50 V charging and even at high temperature. Hence, TiO2-coated LiMn2O4 can be a promising candidate of cathode active material for lithium-ion batteries.
Original language | English |
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Pages (from-to) | 232-236 |
Number of pages | 5 |
Journal | Journal of Ceramic Processing Research |
Volume | 16 |
Issue number | 2 |
Publication status | Published - 2015 |
Bibliographical note
Publisher Copyright:© 2015, Hanyang University. All rights reserved.
Keywords
- LiMnO
- Mn dissolution
- Surface modification
- TiO
ASJC Scopus subject areas
- Ceramics and Composites