SECONDARY BATTERY, PROCESS FOR PREPARING THE SAME AND APPARATUS CONTAINING THE SECONDARY BATTERY

The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. The negative electrode film of the secondary battery 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; and 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 the first negative electrode active material satisfies: 0.60≤S1≤0.85, where S1=W2H/(W3R+W2H); and the second negative electrode active material comprises artificial graphite, in which W3R is a peak area of 101 crystal plane in a X-ray diffraction spectrum of the first negative electrode active material at a diffraction angle of 43.3±0.05°, and W2H is a peak area of 101 crystal plane in a X-ray diffraction spectrum of the first negative electrode active material at a diffraction angle of 44.5±0.05°. The secondary battery according to the present application has both better low-temperature rate performance and longer high-temperature cycle life while having a higher energy density.