Lithium cobalt oxide (LiCoO₂) powder was prepared by co-precipitation method and annealed at different temperatures of between 300 and 700 °C. The effect of annealing temperature and effect washing process with deionized water on the crystal structures of the prepared LiCoO₂ powders were thoroughly studied by Synchrotron powder X-Ray Diffraction (Syn-XRD), X-ray Absorption Spectroscopy (XAS), Dispersive Raman Microscopy (Raman) techniques. The change in chemical composition as a function of annealing temperature was also investigated by X-ray Photoelectron Spectroscopy (XPS) technique. The crystal structural results identified the phase evolution of the prepared LiCoO₂ powders upon heat treatment. The formation of HT-LiCoO₂ phase was observed at annealing temperature as low as 300 °C.

采用共沉淀法制备钴酸锂 (LiCoO ₂ ) 粉末，并在 300 至 700 °C 的不同温度下退火。通过同步辐射粉末 X 射线衍射 (Syn-XRD)、X 射线吸收光谱 (XAS)、色散拉曼显微镜深入研究了退火温度和去离子水洗涤工艺对制备的 LiCoO ₂粉末晶体结构的影响（拉曼）技术。还通过 X 射线光电子能谱 (XPS) 技术研究了化学成分随退火温度的变化。晶体结构结果确定了所制备的 LiCoO ₂粉末在热处理后的相演变。HT-LiCoO ₂的形成 在低至 300 °C 的退火温度下观察到相。