POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a positive electrode active material for lithium ion secondary batteries, which is easy to increase an electrode density and enables the achievement of a high energy density.SOLUTION: A positive electrode active material for lithium ion secondary batteries comprises: primary particles made of a lamellar solid solution compound; and secondary particles composed of agglomerates of the primary particles. The secondary particles have a crushing strength of 10-40 MPa.