Electrode active material and battery

Abstract

In the present disclosure, the problem is solved by providing an electrode active material obtained by agglomerating a plurality of primary particles with a binder, wherein: the primary particles are a Si-based active material containing a Si element; the binder is an organic polymer having a tensile modulus not less than 0.10 MPa and not more than 1100 MPa; a ratio of the binder relative to a total of the primary particles and the binder is not less than 1 weight % and not more than 20 weight %; and a particle size D50 of the electrode active material is not less than 2.5 μm and not more than 20 μm.

Dependencies are inferred from the claim text.