Positive electrode active substance for lithium ion secondary battery and lithium ion secondary battery
AssigneeToray Industries, Inc.
InventorsHiroaki Kawamura, Tomoya Onozuka
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Abstract
The purpose of the present invention is to provide positive electrode active substance particles for a lithium ion secondary battery, such particles being capable of producing a lithium ion secondary battery having excellent high-speed discharge properties. The present invention is a granulated body of a positive electrode active substance for a lithium ion secondary battery, wherein the primary particle average diameter is 10 to 80 nm and the number of primary particles having a diameter of 100 nm or greater is no more than 5.0%.
Claims12
A positive electrode active material for a lithium ion secondary battery, which comprises a granulated body of positive electrode active material particles for a lithium ion secondary battery, wherein an average particle diameter of primary particles is 10 nm or more and 80 nm or less, and a number ratio of particles having a particle diameter of 100 nm or more is 1.2% or higher and 5.0% or less.
Dependencies are inferred from the claim text.