| abstract |
Provided is a storage element with improved output performance at low temperatures. In the present embodiment, an electrode having an active material layer is provided, the active material layer includes at least active material particles, and the volume-based particle size frequency distribution of particles contained in the active material layer has a first peak and A particle size having a second peak that appears in the larger particle size than the first peak, and in the particle size frequency distribution, the particle size at which the frequency is minimized between the first peak and the second peak. When Dx, the volume ratio of particles having a particle diameter of Dx or less is 49% or more and 62% or less of the volume of all particles included in the active material layer. 【Selection chart】 None |