Patent ID: 8968935
Filing Date: 2015-03-03
Classification: H01M,Y02E,Y02T

Abstract:
1. An anode for a lithium ion secondary battery comprising: an anode active material layer in which a first layer containing silicon as an anode active material; and a second layer containing silicon and a metal element as an anode active material are alternately layered on an anode current collector, wherein the first layer and the second layer each include a first region and a second region, the first and second regions separated by an insertion layer comprising at least one of a lamellar oxide-containing region and a lamellar nitrogen-containing region, the at least one of the lamellar oxygen-containing region and the lamellar nitrogen-containing region extending parallel to the anode current collector, and an atomic ratio of oxygen to silicon in the oxygen-containing region or an atomic ratio of nitrogen to silicon in the nitrogen-containing region ranging from 0.01 to 0.5.