Annealing-Temperature Effect on Various Cutoff-Voltage Electrochemical Performances in AlPO[sub 4]-Nanoparticle-Coated LiCoO[sub 2]
- 1 January 2005
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 152 (1), A32-A36
- https://doi.org/10.1149/1.1825387
Abstract
The electrochemical properties of AlPO4AlPO4 -coated LiCoO2LiCoO2 cathodes were found to be superior to those of bare cathodes at various charge-cutoff voltages (4.3, 4.6, and 4.8 V), and depended on the annealing temperature. The AlPO4AlPO4 -coated cathodes annealed at 600 and 700°C retained a discharge capacity of ∼150 mAh/g even with a 4.8 V charge-cutoff voltage (after 46 cycles at 1 C=140C=140 mA/g). The bare cathode showed zero capacity retention at the same condition after only 20 cycles. The enhanced electrochemical performance and rate capability in the coated cathodes were attributed to the inhibition of structural degradation during cycling. The AlPO4AlPO4 -nanoparticle coating layer on the LiCoO2LiCoO2 effectively suppressed cobalt dissolution and a nonuniform distribution of local strain in the cathode. © 2004 The Electrochemical Society. All rights reserved.Keywords
This publication has 28 references indexed in Scilit:
- Electrochemical Stability of Thin-Film LiCoO2 Cathodes by Aluminum-Oxide CoatingChemistry of Materials, 2003
- High Capacity Surface-Modified LiCoO2 Cathodes for Lithium-Ion BatteriesElectrochemical and Solid-State Letters, 2002
- Zero-Strain Intercalation Cathode for Rechargeable Li-Ion CellAngewandte Chemie International Edition, 2001
- High-Performance ZrO[sub 2]-Coated LiNiO[sub 2] Cathode MaterialElectrochemical and Solid-State Letters, 2001
- LiCoO[sub 2] Cathode Material That Does Not Show a Phase Transition from Hexagonal to Monoclinic PhaseJournal of the Electrochemical Society, 2001
- Novel LiCoO2 Cathode Material with Al2O3 Coating for a Li Ion CellChemistry of Materials, 2000
- LiAl y Co1 − y O 2 ( R 3̄m ) Intercalation Cathode for Rechargeable Lithium BatteriesJournal of the Electrochemical Society, 1999
- TEM Study of Electrochemical Cycling‐Induced Damage and Disorder in LiCoO2 Cathodes for Rechargeable Lithium BatteriesJournal of the Electrochemical Society, 1999
- Electronic Conductivity of LiCoO2 and Its Enhancement by Magnesium DopingJournal of the Electrochemical Society, 1997
- An Improved Li / Li x CoO2 Rechargeable CellJournal of the Electrochemical Society, 1989