US 12,347,859 B2
Positive active material, positive electrode plate, electrochemical energy storage apparatus, and apparatus
Rui Du, Ningde (CN); Yongchao Liu, Ningde (CN); Chongheng Shen, Ningde (CN); Sihui Wang, Ningde (CN); and Na Liu, 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 22, 2023, as Appl. No. 18/321,318.
Application 18/321,318 is a continuation of application No. 17/418,401, granted, now 11,699,789, previously published as PCT/CN2019/129369, filed on Dec. 27, 2019.
Claims priority of application No. 201811647026.X (CN), filed on Dec. 29, 2018.
Prior Publication US 2023/0307635 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/525 (2010.01); C01G 53/50 (2025.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/54 (2013.01); C01P 2004/51 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 15 Claims
 
1. An electrochemical energy storage apparatus, wherein the electrochemical energy storage apparatus comprising positive active material and negative active material, the positive active material is ternary materials comprising Ni, Co, and M, the ratio of nickel, cobalt and manganese is y:z:k, y+z+k=1, 0.7≤y≤0.9, M is selected from one or two of Mn and Al;
the actual specific surface area BET2 of the positive active material is 0.5 m2/g to 1.5 m2/g;
the particle size Dn10 of the positive active material satisfies: 0.3 μm≤Dn10≤2 μm, the particle size Dv10 of the positive active material satisfies: 0.5 μm≤Dv10≤3 μm;
Dn10 is a corresponding particle size when a cumulative number distribution percentage of the positive active material reaches 10%;
Dv10 is a corresponding particle size when a cumulative volume distribution percentage of the positive active material reaches 10%.