Abstract
Thermodynamic calculation method was adopted to predict the reaction mechanism of LiCoO 2 prepared by hydrothermal–electrochemical process. It was found that in the Co–LiOH–H 2O system, Co was oxidized to HCoO 2 −, Co(OH) 2 (100 °C) or CoO (150 °C), CoOOH in sequence with the increase of electrode potential, then the ion-exchange reaction of CoOOH and lithium ion occurred and LiCoO 2 came into being. The optimum synthesis parameter was obtained through thermodynamic calculation and it was validated experimentally by cyclic voltammogram method.
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