WOUND-TYPE CELL, LITHIUM ION SECONDARY BATTERY AND NEGATIVE ELECTRODE PLATE

The present application discloses a wound electrode assembly, a lithium-ion secondary battery and a negative electrode plate, wherein the negative electrode plate of the wound electrode assembly includes a negative electrode current collector and a negative active material layer disposed on two opposite surfaces of the negative electrode current collector, and the negative active material layer includes a negative active material; and wherein the two negative active material layers respectively include active an material layer in an unpaired region and an active material layer in a paired region distributed successively in the length direction of the negative electrode plate, and two active material layers in the unpaired regions are arranged at both ends in the length direction of the negative electrode plate, and a first metallic lithium layer is disposed on the surface of one or both of the active material layers in the unpaired regions, so that to form a first lithium pre-intercalation compound in either or both of the active material layers in the unpaired regions. The wound electrode assembly provided in the present application enables the lithium-ion secondary battery to have both high cycle performance and storage performance at the same time.