Positive active material for lithium secondary battery, method for production thereof, electrode for lithium secondary battery and lithium secondary battery
AssigneeGS Yuasa International Ltd.
InventorsDaisuke Endo, Hiromasa Muramatsu
Life of this patent
Estimating the term…
Abstract
The 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 no less than 1900 ppm and no more than 8000 ppm, and has a 50% particle size (D50) of 5 μm or less in particle size distribution measurement.
Claims6
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 1900 ppm or more and 8000 ppm or less, and has a 50% particle size (D50) of 5 μm or less in particle size distribution measurement.
Dependencies are inferred from the claim text.