Abstract: An electrode for a non-aqueous electrolyte secondary battery, which is an example of an embodiment, has a belt-shaped negative electrode current collector and a negative electrode mixture layer formed on the surface of the negative electrode current collector. The negative electrode mixture layer contains a first Si-based active material and a second Si-based active material, each of which has a structure in which Si particles are dispersed in an oxide phase. The Si particle content in the first Si-based active material is higher than the Si particle content in the second Si-based active material, and, in the negative electrode mixture layer, the ratio of the mass of the first Si-based active material to the total mass of the first Si-based active material and the second Si-based active material is greater at the center than at the end in the width direction of the negative electrode current collector.

Abstract: A non-aqueous electrolyte secondary cell comprising a negative electrode (12) having a negative electrode collector (40) and a negative electrode active material layer (42) provided on the negative electrode collector (40). The negative electrode active material layer (42) contains graphite particles A and graphite particles B as negative electrode active materials. The graphite particles A have an internal void rate of 5% or less. The graphite particles B have an internal void rate of 8 to 20%. When the negative electrode active material layer 42 is halved in the thickness direction, a region 42b on the half closer to the outer surface contains more graphite particles A than a region 42a on the half closer to the negative electrode collector.