Preparation and Electrochemical Properties of Cathode Materials for Lithium Ion Battery by Aerosol Process
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概要
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Lithium transition metal oxide powders such as LiMn_2O_4, LiNi_<0.5>Mn_<1.5>O_4, LiCo_<1/3>Ni_<1/3>Mn_<1/3>O_2 and LiFePO_4 were prepared by spray pyrolysis. The particle characteristics of them were determined by SEM, XRD, BET and AAS. Lithium transition metal oxide powders had spherical morphology of 1- 2 μm with narrow size distribution and homogeneous chemical composition. The electrochemical properties of cathode were also estimated by rechargeable capacity, cycle performance, thermal stability and high rate charging. The cathodes obtained by spray pyrolysis exhibited higher rechargeable capacity and good cycle stability. Mass production of lithium transition metal oxide powders was carried out by using internal combustion type of spray pyrolysis. The electrochemical properties of cathode obtained by internal combustion type spray pyrolysis were comparable with these obtained by spray pyrolysis.
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