SECONDARY BATTERY, PREPARATION METHOD THEREFOR AND DEVICE COMPRISING THE SECONDARY BATTERY

The present application relates to a secondary battery, a method for manufacturing the same and an apparatus containing the same. Specifically, in the secondary battery of the present application, a negative electrode film comprises a first negative electrode film and a second negative electrode film, the first negative electrode film is disposed on at least one surface of the negative electrode current collector and comprises a first negative electrode active material, the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material. The first negative electrode active material comprises natural graphite and satisfies: 6 mΩ•cm ≤ A ≤ 12 mΩ•cm, the second negative electrode active material comprises artificial graphite and satisfies: 13 mΩ•cm ≤ B ≤ 20 mΩ•cm, A is a powder resistivity of the first negative electrode active material tested at a pressure of 8 Mpa, and B is a powder resistivity of the second negative electrode active material tested at a pressure of 8 Mpa. The secondary battery of the present application can have better kinetic performance and longer cycle life while maintaining higher energy density.