A battery capable of improving battery characteristics such as cycle
characteristics is provided. A coating containing lithium fluoride and
lithium hydroxide is provided on the surface of an anode active material
layer. The ratio between lithium fluoride and lithium hydroxide is in the
range, in which the Li.sub.2F.sup.+/Li.sub.2OH.sup.+ peak intensity ratio
obtained in positive ion analysis by a Time of Flight-Secondary Ion Mass
Spectrometry is 1 or more. The anode active material layer contains a
substance containing Si or Sn as an element as an anode active material.
By the coating, oxidation of the anode active material layer is
inhibited, and decomposition reaction of the electrolytic solution is
inhibited.