| 摘要 |
PROBLEM TO BE SOLVED: To provide an active material sheet which can enhance the electrical capacity by increasing the density of particles of an active material, and to provide an electrode using the same.SOLUTION: The active material sheet includes an active material for storing charges, and a binder for binding the active material. Out of the particles visible in the observation visual field, 90% or more of particles have a particle size of d≤20 μm. The active material includes a first group and a second group. In the active material of first group, the particles have a particle size of d≤5 μm, and a circularity of 0.850-1.000. In the active material of second group, the particles have a particle size of 5 μm<d≤20 μm, and a circularity of 0.500-0.850. |
