| 摘要 |
Provided is a cathode material for a lithium secondary battery, comprising a heat-treated mixture of an oxide powder (a) represented by Formula I and an oxide powder (b) represented by Formula II, wherein a mixing ratio of the oxide powder (a):oxide powder (b) is in a range of 30:70 to 90:10, the oxide powder (a) is monolithic particles having a D50 of more than 10 mum, and the oxide powder (b) is agglomerated particles having a D50 of less than 10 mum, and heat treatment is carried out at a temperature of 400° C. or higher. <?in-line-formulae description="In-line Formulae" end="lead"?>LiCoO<SUB>2</SUB> (I) <?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>Li<SUB>z</SUB>MO<SUB>2</SUB> (II) <?in-line-formulae description="In-line Formulae" end="tail"?> wherein 0.95<Z<1.1; M=NI<SUB>1-x-y</SUB>Mn<SUB>x</SUB>Co<SUB>y</SUB> , 0 <y<0.5, and a ratio of Mn to Ni (x/(1-x-y)) is in a range of 0.4 to 1.1. |
