Control of AlPO4-nanoparticle coating on LiCoO2 by using water or ethanol

The electrochemical properties of AlPO4-coated LiCoO2 cathodes prepared in a water or ethanol solvent were characterized with the view of stabilizing LiCoO2 at charge-cutoff voltages of 4.6 and 4.8 V. Under the influence of the AlPO 4 crystallinity, the coated LiCoO2 prepared in ethanol had better capacity retention than those prepared in water. This enhancement also correlated with the improved suppression of Li-diffusivity decay in the coated cathode from the ethanol compared to that from water. In addition, the differential scanning calorimetry (DSC) results of the AlPO4 nanoparticle-coated LiCoO2 with ethanol showed an enhanced thermal stability. © 2005 Elsevier Ltd. All rights reserved.

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