Spray pyrolysis technique for fabrication of nano-sized spherical agglomerated oxide powders for batteries

Trans Tech Publications Ltd
Publication Type:
Journal Article
Journal of Metastable and Nanocrystalline Materials, 2003, 15-16 pp. 325 - 330
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Application of the spray pyrolysis technique to in-situ fabrication ofnano-featured spherical oxide matcrials has been explored in this paper. Two different nano-featured single-phase materials for battery use, namely LiCOOl and PbO, were successfully prepared in spherical form. The diameters of the spheres are in the range of a few microns, generally 1-10 microns, and there is a narrow Gaussian particle size distribution. The diameter size can be controlled by the size of the spray nozzle and the concentration of the solution. The spherical agglomerates appear to consist of nano-particles, each one with dimensions of 20-50 run. The specific surface areas of these materials are several times higher than for the corresponding commercially available powders. The stoichiometry of the LiCoO, powders thus obtained was controlled by the ICP tcchnique in order to achieve the dcsired Li:Co = 1:1 ratio in the sintered materials. The materials prepared by the spray pyrolysis technique appear to be promising for battery use.
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