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POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY COMPRISING LITHIUM COBALT-BASED OXIDE OF IMPROVED PERFORMANCE AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME
POSITIVE ELECTRODE ACTIVE MATERIAL FOR SECONDARY BATTERY COMPRISING LITHIUM COBALT-BASED OXIDE OF IMPROVED PERFORMANCE AND LITHIUM SECONDARY BATTERY COMPRISING THE SAME
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机译：包含锂钴基氧化物提高了性能的二次电池的正电极活性材料和包含相同锂二次电池的正电极活性材料
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摘要
PURPOSE: A positive electrode active material for a secondary battery is provided to provide a lithium secondary battery capable of improving capacity and high temperature storage performance and low temperature storage performance. CONSTITUTION: A positive electrode active material for a secondary battery comprises active material particle(A) with a relatively large average particle size, and active material particle(B) with a relatively small average particle size. The active material particle(A) and the active material particle(B) are independently comprises a composition in chemical formula 1: Li_aCo_(1-x-y)Mg_xTi_yO_(2-z)M_z. In chemical formula 1, 0.9a1.1, 0x=0.4, 0y=0.2, 0=z=0.5, M is S, N or a halogen element. The particle diameter range of the active material particle(A) is 15-22 micron and the particle diameter range of the active material particle(B) is 1-6 micron.
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