Negative electrode for secondary battery and secondary battery with negative electrode

Abstract

The negative electrode of the secondary battery of a present disclosure is a negative electrode for secondary battery that includes a negative electrode current collector, and a negative electrode active material layer supported by the negative electrode current collector. The negative electrode active material layer includes a lower layer positioned at a side of the negative electrode current collector and an upper layer positioned at a surface side, the upper layer contains a first graphite particle and a first Si-containing particle, as a negative electrode active material, and the lower layer contains a second graphite particle and a second Si-containing particle, as the negative electrode active material. Then, a mean circularity C1 of the first Si-containing particle is larger than a mean circularity C2 of the second Si-containing particle.

Dependencies are inferred from the claim text.