| abstract |
The present invention includes a negative electrode active material layer including a negative electrode active material, the negative active material includes a core and a coating layer disposed on the core, the core includes a natural graphite and an amorphous carbon layer, the natural graphite D 50 is 10 µm to 14 µm, and when confirmed through ONH analysis, 1,500 ppm by weight to 2,000 ppm by weight of oxygen, 200 ppm by weight to 300 ppm by weight of nitrogen, and 200 ppm by weight to 300 ppm by weight in the negative active material Hydrogen, and the coating layer relates to a negative electrode and a secondary battery comprising carbon nanofibers. |