Patent ID: 8076027
Filing Date: 2011-12-13
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A negative electrode for a lithium secondary battery comprising: a separator; a negative electrode active material layer fixed to the separator, the negative electrode active material layer being capable of storing and emitting lithium ions and containing at least one selected from a group consisting of silicon, silicon alloys, compounds containing silicon and oxygen, compounds containing silicon and nitrogen, compounds containing silicon and fluorine, tin, tin alloys, compounds containing tin and oxygen, compounds containing tin and nitrogen, and compounds containing tin and fluorine; and a current collector layer formed on a side of the negative electrode active material layer, the side opposite to the separator, wherein the negative electrode active material layer is provided with a groove opened to a side opposite to the separator; and the groove has a wall surface and the current collector layer is on the wall surface.