POSITIVE ELECTRODE ACTIVE MATERIAL, ELECTRODE, AND BATTERY

Abstract

A positive electrode active material comprises secondary particles. Each of the secondary particles includes primary particles. Each of the primary particles includes an olivine-type phosphate compound. Carbon is adhered to at least part of a surface of the primary particle. As for a cross section of the secondary particle, a peak height ratio of a first Raman spectrum measured for a central portion of the secondary particle is 14% or less. The peak height ratio is determined by the equation “R=Ip/Ic”. In the equation, “R” represents the peak height ratio. “Ip” represents a height of a peak at or near 850 cm−1. “Ic” represents a height of either a peak at or near 1350 cm−1 or a peak at or near 1580 cm−1, whichever is higher.

CPC Classifications