Positive active material for lithium secondary battery, precursor of positive active material, electrode for lithium secondary battery and lithium secondary battery
AssigneeGS Yuasa International Ltd.
InventorsDaisuke Endo, Hiromasa Muramatsu
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Abstract
Provided is a positive active material for a lithium secondary battery includes a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure and represented by the composition formula of Li1+αMe1−αO2 (Me is a transition metal including Co, Ni and Mn and α>0). The positive active material contains Na in an amount of 900 ppm or more and 16000 ppm or less, or K in an amount of 1200 ppm or more and 18000 ppm or less.
Claims8
1-8. (canceled)
A positive active material for a lithium secondary battery, comprising a lithium transition metal composite oxide having an α-NaFeO2-type crystal structure and represented by the composition formula of Li1+αMe1−αO2 (Me is a transition metal including Co, Ni and Mn and α>0), wherein the positive active material contains Na in an amount of more than 3000 ppm and 10000 ppm or less, or K in an amount of 4000 ppm or more and 10000 ppm or less.
Dependencies are inferred from the claim text.