| abstract |
When an active material layer is formed by continuous pressure molding such as roll pressure molding, even if the molding speed is increased, an electric material having an active material layer that is excellent in thickness accuracy, uniform, and has a large thickness. Provided is a composite particle for an electrochemical element electrode capable of obtaining a chemical element electrode. In a composite particle for an electrochemical device electrode containing an electrode active material, a conductive material, and a binder, the primary particle of the composite particle has a volume average particle diameter of 1 to 500 μm, and the composite particle obtained on a volume basis is used. In the particle size distribution of the primary particles, the secondary particles of the composite particles obtained on a volume basis in the measurement at 23 ° C. where the relative particle amount of the primary particles having a particle diameter in the minute range near the mode diameter R1 of the primary particles is ρ1. In this particle size distribution, ρ2 / ρ1 is set to 0.03 to 0.60, where ρ2 is the amount of secondary particle relative particles having a particle diameter in the minute range. [Selection] Figure 1 |