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METHOD FOR PREPARING POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR AND POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY HAVING CONCENTRATION-GRADIENT LAYER USING BATCH REACTOR, AND POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR AND POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY PREPARED BY THE METHOD
METHOD FOR PREPARING POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR AND POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY HAVING CONCENTRATION-GRADIENT LAYER USING BATCH REACTOR, AND POSITIVE ELECTRODE ACTIVE MATERIAL PRECURSOR AND POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY PREPARED BY THE METHOD
The present invention relates to a method for preparing a positive electrode active material precursor and a positive electrode material for a lithium secondary battery having a concentration-gradient layer using a batch reactor, and to a positive electrode active material precursor and a positive electrode material for a lithium secondary battery prepared by the method. The method for preparing a positive electrode active material precursor and a positive electrode active material for a lithium secondary battery having a concentration-gradient layer using a batch reactor involves supplying a predetermined amount of a chelating agent into the batch reactor, and simultaneously supplying transition metals while continuously adjusting the concentration of the transition metals such that the concentration-gradient layer can be formed from a core to a shell of the positive electrode active material in a more economically advantageous and stable manner, and at the same time a positive electrode active material having an elongated lifespan and improved thermal stability can be provided.
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