公开(公告)号：US20250070132A1

公开(公告)日：2025-02-27

申请号：US18672314

申请日：2024-05-23

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Narae KIM ,  Deok-Hyun Kim ,  Youngugk Kim ,  Eunji Kang ,  Jaewon Kim ,  IIyoung Choi ,  Hyejin Kim ,  Yookyung Kim ,  Banseok Lee

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583 ,  H01M4/60 ,  H01M10/052

Abstract: A negative electrode active material, including silicon nanoparticles including an amorphous carbon coating layer on a surface of the silicon nanoparticles; and pores, wherein the negative electrode active material has a sphericity as represented by Equation 1 of about 0.9 to about 1.0, and the pores include mesopores, and a ratio of a mesopores volume relative to a total pore volume of the negative electrode active material is about 30% or more and less than about 70%, and Sphericity ⁢ ( S ) = 4 ⁢ π × A / B 2 [ Equation ⁢ 1 ] in Equation 1, A is an area of the negative electrode active material and B is a circumference of a shape of the negative electrode active material.