US 12,148,925 B2
Anode active material for batteries, and method for preparing same
Shu Luo, Jiangsu (CN); Zhe Li, Jiangsu (CN); Daosong Zha, Jiangsu (CN); Fang Wang, Jiangsu (CN); Cen Wang, Jiangsu (CN); and Hebao Zhang, Jiangsu (CN)
Assigned to Berzelius (Nanjing) Co., Ltd., Nanjing (CN); and Berzelius (Hefei) Co., Ltd., Hefei (CN)
Appl. No. 17/788,446
Filed by Berzelius (Nanjing) Co., Ltd., Jiangsu (CN); and Berzelius (Hefei) Co., Ltd., Anhui (CN)
PCT Filed Dec. 29, 2020, PCT No. PCT/CN2020/140717
§ 371(c)(1), (2) Date Jun. 23, 2022,
PCT Pub. No. WO2021/136245, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 201911406235.X (CN), filed on Dec. 31, 2019; and application No. 201911412337.2 (CN), filed on Dec. 31, 2019.
Prior Publication US 2023/0034396 A1, Feb. 2, 2023
Int. Cl. H01M 4/485 (2010.01); H01M 4/02 (2006.01); H01M 4/62 (2006.01)
CPC H01M 4/485 (2013.01) [H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 4/625 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An anode active material for batteries, comprising anode active substance particles, the anode active substance particles comprising a silicon oxide compound,
wherein the anode active substance particles further comprise lithium and a non-lithium doping metal, and
wherein the non-lithium doping metal comprises a metal M1 including one or more of titanium, magnesium, zirconium, zinc, aluminum, yttrium and calcium, and a content of the metal M1 in the anode active material is 0.01-20 wt %;
wherein the metal M1 exists in the anode active material is in a form of an oxygen-containing compound, and the oxygen-containing compound is dispersedly distributed in the silicon oxide compound; and
wherein the anode active substance particles further comprise nano-silicon grains that are regularly dispersed in the anode active substance particles, and a median size of the nano-silicon grains is 1-15 nm.