POSITIVE-ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE, BATTERY, BATTERY PACK, ELECTRONIC DEVICE, ELECTRIC VEHICLE, ELECTRICITY STORAGE DEVICE, AND ELECTRIC POWER SYSTEM

摘要

A positive electrode includes first active material particles, second active material particles, and third active material particles, and the second active material particles are aggregated particles formed by aggregation of primary particles. The average particle size D1 of the first active material particles, the average particle size D2 of the second active material particles, and the average particle size D3 of the third active material particles satisfy a relationship of D1 > D2 > D3. The particle disintegration rate ±1 of the first active material particle and the particle disintegration rate ±2 of the third active material particle are not more than 20%, and the particle disintegration rate ² of the second active material particle is not less than 70%.