Negative electrode of secondary battery, and secondary battery using the negative electrode

Abstract

The negative electrode 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 first layer existing on a side of a surface layer part and a second layer existing on a side of the negative electrode current collector. The first layer includes first graphite particles and first Si-containing particles. The second layer includes second graphite particles and second Si-containing particles. The Si content ratio in the first Si-containing particle is smaller than that in the second Si-containing particle. Each of the first Si-containing particle and the second Si-containing particle is coated with a conductive material. The ratio of the coating amount (mass %) of the conductive material for the second Si-containing particle to the coating amount (mass %) of the conductive material for the first Si-containing particle is 2.5 or more.

Dependencies are inferred from the claim text.