Abstract
A high-performance LiCoO2 cathode was successively fabricated by a sol-gel coating of Al2O3 to the LiCoO2 particle surfaces and subsequent heat treatment at 600 degreesC for 3 h. Unlike bare LiCoO2, the Al2O8-coated LiCoO2 cathode exhibits no decrease in its original specific capacity of 174 mA h/g (vs Lithium metal) and excellent capacity retention (97% of its initial capacity) between 4.4 and 2.15 V after 50 cycles. A similar excellent capacity retention of the coated LiCoO2 is also observed in a Li ion cell (C/LiCoO2). This is because the high concentration of Al atoms at the particle surface region leads to the enhancement of structural stability of LiCoO2 during cycling, which originates from the disappearance of the phase transition from a hexagonal to monoclinic phase.
Keywords
Monoclinic crystal systemCathodeMaterials scienceCoatingLithium (medication)Phase (matter)IonParticle (ecology)Chemical engineeringAnalytical Chemistry (journal)CrystallographyNanotechnologyCrystal structureChemistryPhysical chemistryChromatography
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Publication Info
- Year
- 2000
- Type
- article
- Volume
- 12
- Issue
- 12
- Pages
- 3788-3791
- Citations
- 633
- Access
- Closed
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Cite This
Jaephil Cho,
Yong Jeong Kim,
Byungwoo Park
(2000).
Novel LiCoO<sub>2</sub> Cathode Material with Al<sub>2</sub>O<sub>3</sub> Coating for a Li Ion Cell.
Chemistry of Materials
, 12
(12)
, 3788-3791.
https://doi.org/10.1021/cm000511k
Identifiers
- DOI
- 10.1021/cm000511k