Synthesis of ultrafine LiCoO2 powders by the sol-gel method |
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Authors: | Yang -Kook Sun In -Hwan Oh Seong -Ahn Hong |
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Affiliation: | (1) Daeduk R and D Centre, Samsung Heavy Industries Co. Ltd, Daeduk Science Town, P.O. Box 43, 305-600 Daejeon, Korea;(2) Division of Chemical Engineering, Korea Institute of Science and Technology, Cheongryang, P.O. Box 131, 130-650 Seoul, Korea |
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Abstract: | Ultrafine high-temperature (HT) LiCoO2 powders were synthesized by the sol-gel method using polyacrylic acid (PAA) as a chelating agent. The decomposition process of the gel precursor was examined to determine the crystallization temperature and the dependence of the physicochemical properties of HT-LiCoO2 powders on the PAA quantity was extensively investigated. Polycrystalline HT-LiCoO2 powders, composed of very uniformly sized ultrafine particulates with an average particle size of 30–50 nm and a specific surface area of 2.3–17 m2g–1, could be obtained at the lower calcination temperature of 550 °C and the shorter calcination time of 1 h compared to the solid-state reaction. |
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