US 11,855,289 B2
Negative electrode active material, process for preparing the same, and battery, battery module, battery pack and apparatus related to the same
Chengdu Liang, Ningde (CN); Yuzhen Zhao, Ningde (CN); Yingjie Guan, Ningde (CN); Yan Wen, Ningde (CN); and Qisen Huang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
Filed on Dec. 28, 2021, as Appl. No. 17/563,071.
Application 17/563,071 is a continuation of application No. PCT/CN2020/103107, filed on Jul. 20, 2020.
Claims priority of application No. 201910689512.6 (CN), filed on Jul. 29, 2019.
Prior Publication US 2022/0123314 A1, Apr. 21, 2022
Int. Cl. H01M 4/62 (2006.01); H01M 4/04 (2006.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/62 (2013.01) [H01M 4/0402 (2013.01); H01M 4/364 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A negative electrode active material, comprising a core material and a polymer modified coating on at least part of a surface of the core material;
wherein the core material is one or more of a silicon-based negative electrode material and a tin-based negative electrode material; and
wherein the negative electrode active material has a weight loss rate satisfying 0.2%≤weight loss rate≤2% in a thermogravimetric analysis test wherein temperature is elevated from 25° C. to 800° C. under a non-oxidizing inert gas atmosphere.