US 12,334,544 B2
Negative electrode material and electrochemical apparatus and electronic apparatus containing the negative electrode material
Ting Yi, Ningde (CN); Hang Cui, Ningde (CN); and Yuansen Xie, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Filed by Ningde Amperex Technology Limited, Ningde (CN)
Filed on Oct. 27, 2021, as Appl. No. 17/512,053.
Application 17/512,053 is a continuation of application No. PCT/CN2019/121736, filed on Nov. 28, 2019.
Prior Publication US 2022/0052324 A1, Feb. 17, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/48 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A negative electrode material, wherein the negative electrode material comprises silicon-based particles, and the silicon-based particles comprise:
a silicon oxide SiOx, wherein x is 0.5 to 1.6; and
a carbon layer, wherein the carbon layer covers at least a portion of a surface of the silicon oxide SiOx;
wherein in a Raman spectrum, a ratio of a height I1350 of the silicon-based particles at a peak of 1350 cm−1 to a height I1580 at a peak of 1580 cm−1 is 0<I1350/I1580<5; and
a ratio of a height I510 at a peak of 510 cm−1 to the height I1350 at the peak of 1350 cm−1 is 2.3<I510/I1350<12.