Hydrothermal synthesis of LiCoO₂ fine powder and evaluation of its electrochemical properties

Abstract

LiCoO₂ fine powder was prepared from CoOOH and LiOH·H₂O by hydrothermal method for micro lithium ion battery application. In this study, CH₃COOLi and NH₄OH were examined as the additives. SEM and DLS observations revealed that the particle size of obtained LiCoO₂ power was ~100 nm regardless of addition of CH₃COOLi or NH₄OH. However, the discharge capacity was greatly affected by the additives. The LiCoO₂ prepared without the additives exhibited 96 mA h g^-1, but those prepared with CH₃COOLi or NH₄OH exhibited 106 mA h g^-1 or 125 mA h g^-1. This result suggests that the additives play great roles in the hydrothermal synthesis of LiCoO₂.