US 12,355,071 B2
Positive electrode active material, electrochemical apparatus, and electronic device
Yuqun Zeng, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong (CN)
Filed on May 24, 2023, as Appl. No. 18/322,824.
Application 18/322,824 is a continuation of application No. PCT/CN2022/079167, filed on Mar. 4, 2022.
Claims priority of application No. 202110742609.6 (CN), filed on Jun. 26, 2021.
Prior Publication US 2023/0299275 A1, Sep. 21, 2023
Int. Cl. H01M 4/36 (2006.01); C01B 25/45 (2006.01); H01M 4/131 (2010.01); H01M 4/48 (2010.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C01B 25/45 (2013.01); H01M 4/131 (2013.01); H01M 4/48 (2013.01); H01M 4/5825 (2013.01); H01M 4/625 (2013.01); H01M 10/054 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A positive electrode active material, comprising:
a conductive base material, and an active substance distributed at the conductive base material, the active substance having a core-shell structure, and the core-shell structure including a core layer material and a shell layer material;
wherein:
the conductive base material comprises a carbon material, the core layer material comprises a phosphate-based sodium salt material, and the shell layer material comprises a metal oxide;
a mass percentage of the shell layer material in the positive electrode active material is 1% to 10%;
a mass percentage of the conductive base material in the positive electrode active material is 1% to 10%; and
a median particle size of the positive electrode active material is 5 μm to 20 μm.