US 12,074,315 B2
Positive-electrode plate, lithium-ion battery equipped with the positive-electrode plate, battery module, battery pack, and apparatus
Yuqun Zeng, Ningde (CN); Chengdu Liang, Ningde (CN); Changliang Sheng, Ningde (CN); Huafeng Huang, Ningde (CN); and Qisen Huang, Ningde (CN)
Assigned to Contemporary Amperex Technology Co., Limited, Ningde (CN)
Appl. No. 17/057,062
Filed by Contemporary Amperex Technology Co., Limited, Ningde (CN)
PCT Filed Sep. 26, 2019, PCT No. PCT/CN2019/108134
§ 371(c)(1), (2) Date Nov. 19, 2020,
PCT Pub. No. WO2020/063740, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. 201811151916.1 (CN), filed on Sep. 29, 2018.
Prior Publication US 2021/0210749 A1, Jul. 8, 2021
Int. Cl. H01M 4/36 (2006.01); C01G 53/00 (2006.01); H01M 4/131 (2010.01); H01M 4/1315 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [C01G 53/50 (2013.01); H01M 4/131 (2013.01); H01M 4/1315 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A positive-electrode plate, comprising a positive-electrode current collector and at least one positive-electrode active substance layer disposed on a surface of the positive-electrode current collector, wherein
the positive-electrode active substance layer comprises a positive-electrode active substance represented by Formula (1):
LixNiyCOzMkMepOrAm  Formula (1);
in Formula (1), 0.95≤x≤1.05, 0≤y≤1, 0≤z≤1, 0≤k≤1, 0≤p≤0.1, y+z+k+p=1, 1≤r≤2, 0≤m≤2, m+r≤2, M is one or two of Mn or Al, Me is one or more of Zr, Zn, Cu, Cr, Mg, Fe, V, Ti, Y, or Nb, and A is one or more of N, F, S, or CI;
an inorganic dielectric layer is disposed on a surface of the at least one positive-electrode active substance layer that is away from the current collector, and the inorganic dielectric layer contains no binder; and
a resistance R of the positive-electrode plate is not higher than 8 ohms, and
the inorganic dielectric layer in the form of discrete lamellae covers a surface of positive-electrode active substance particles, and
a depth H by which the inorganic dielectric layer extends inside the positive-electrode active substance layer in a thickness direction of the positive-electrode active substance layer is 1/1000 to 1/10 of a thickness of the positive-electrode active substance layer.