Negative electrode for lithium secondary battery and lithium secondary battery using the negative electrode

Abstract

A negative electrode for a lithium secondary battery and a lithium secondary battery including the negative electrode. The negative electrode includes a sheet-like current collector and an active material layer being carried thereon and including silicon atom. The active material layer includes a plurality of columnar particles, and in each columnar particle, at least a portion forming the columnar particle is grown to tilt with respect to the direction normal to the current collector. In the thickness direction of the active material layer, porosity Pc of the current collector side lower half of the active material layer and porosity Ps of the surface side upper half of the active material layer satisfy Pc<Ps.

Dependencies are inferred from the claim text.