Preparation and Characterization of Sol-Gel Derived Li_xCoO₂ Ceramics

抄録

The Li_xCoO₂ gels are prepared using a sol-gel route from cobalt(III)acetylacetonate Co(OAc)₂ and LiOH, and their structural changes with temperature are investigated using thermal gravimetric analyses, X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. The results indicate that Li_xCoO₂ is obtained by heating the gels at temperatures as low as 673 K in air, by adding an aqueous NH₄OH to enhance a decomposition of Acetylacenate. Furthermore, Li_xCoO₂ obtained by heating the gels at 1123 K shows a multilayer of thin crystals with a well-developed 003 diffraction.