NEGATIVE ACTIVE MATERIAL, METHOD FOR PREPARING THE SAME, AND RELATED SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK AND APPARATUS

The present application discloses a negative active material, a method for preparing the same, and related secondary batteries, battery modules, battery packs and apparatus. The negative active material includes a core material and a polymer-modified coating layer on at least a part of its surface; the core material includes one or more of silicon-based materials and tin-based materials; the coating layer includes sulfur element and carbon element; in the Raman spectrum of the negative active material, the negative active material has scattering peaks at the Raman shifts of 900cm-1∼960cm-1, 1300cm-1∼1380cm-1 and 1520cm-1∼1590cm-1, respectively, in which the scattering peak at the Raman shift of 900cm-1 ∼ 960cm-1 has a peak intensity recorded as I1, the scattering peak at the Raman shift of 1520cm-1 ∼ 1590cm-1 has a peak intensity recorded as IG, and I1 and IG satisfy 0.2 ≤ I1/IG ≤ 0.8.