NEGATIVE POLE PIECE, BATTERY CELL, LITHIUM ION BATTERY AND PREPARATION METHOD THEREFOR, AND DEVICE CONTAINING LITHIUM ION BATTERY

The present application discloses a negative electrode plate, an electrode assembly, a lithium ion battery, preparation process thereof, and apparatus containing lithium-ion battery. The negative electrode plate includes a negative electrode current collector; a negative electrode active material layer disposed on the negative electrode current collector comprising a negative electrode active material, the negative electrode active material comprising a silicon-based material; a binder-free inorganic dielectric layer disposed on one side of the negative electrode active material layer away from the negative electrode current collector, the inorganic dielectric layer comprising an inorganic dielectric material, and the inorganic dielectric layer including at least a main body portion disposed on the surface of the negative electrode active material layer, the main body portion having a channel penetratingly arranged along a thickness direction of the main body portion; and a lithium metal layer disposed on the surface of the inorganic dielectric layer away from the negative electrode active material layer.