| 摘要 |
The problem of the present invention is to provide a composite active material, which may restrain cracking and peeling of a coating layer, when the composite active material having an active material and the coating layer for coating the surface thereof is kneaded. The present invention solves the above-mentioned problem by providing a composite active material including an active material and a coating layer for coating the surface of the above-mentioned active material, in which microparticles are disposed on the surface thereof, characterized in that the above-mentioned microparticles have a smaller particle diameter than the particle diameter of the active material, and contain Si.
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