NEGATIVE ELECTRODE AND SECONDARY BATTERY

PROBLEM TO BE SOLVED: To enhance the cycle characteristics of a secondary battery.SOLUTION: A negative electrode 15 comprises a sheet-like negative electrode collector 18, a first negative electrode active material layer 19 formed by coating the external surface 181 side (the side where a convex surface is formed by winding) of the negative electrode collector 18 with a negative electrode active material, and a second negative electrode active material layer 20 formed by coating the internal surface 182 side (the side where a concave surface is formed by winding) of the negative electrode collector 18 with a negative electrode active material. The first negative electrode active material layer 19 contains graphite and SiOx as the negative electrode active material capable of occluding and discharging lithium ions. The wt.% of graphite to the composite material in the second negative electrode active material layer 20 is larger than the wt.% of graphite to the SiOx in the first negative electrode active material layer 19.