US 12,469,887 B2
Lithium-ion battery, battery, and electric apparatus
Zeli Wu, Ningde (CN); Changlong Han, Ningde (CN); Bin Jiang, Ningde (CN); and Jie Guo, Ningde (CN)
Assigned to CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed by CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde (CN)
Filed on Aug. 12, 2024, as Appl. No. 18/800,152.
Application 18/800,152 is a continuation of application No. PCT/CN2024/075983, filed on Feb. 5, 2024.
Claims priority of application No. 202311422403.0 (CN), filed on Oct. 30, 2023.
Prior Publication US 2025/0140895 A1, May 1, 2025
Int. Cl. H01M 10/0525 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 10/42 (2006.01); H01M 4/02 (2006.01)
CPC H01M 10/4235 (2013.01) [H01M 4/525 (2013.01); H01M 4/5825 (2013.01); H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2004/028 (2013.01); H01M 2300/004 (2013.01)] 19 Claims
 
1. A lithium-ion battery, comprising:
an electrolyte, comprising lithium salt, wherein the lithium salt comprises lithium hexafluorophosphate, and a mass proportion of the lithium hexafluorophosphate relative to a total mass of the electrolyte is 15% to 20%;
a positive electrode plate, comprising a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector and containing a positive electrode active material, wherein the positive electrode active material comprises a compound with a molecular formula LidNiaCobMncM(1-a-b-c) Qz, wherein 0<d≤2.1, 0.6<a<1, 0<b><1, 0<<<1, 0.6<a+b+c<1, and 1.8<z<3.5; element M comprises at least one of elements Ti and Zr; and element Q comprises at least one of elements O and F;
wherein, the positive electrode active material comprises single crystal particles, the single crystal particle comprises an inner region and an outer region, wherein the outer region is a region extending 500 nm directly from any point on an outer surface of the single crystal particle toward inside of the single crystal particle;
element M comprises element Al, wherein elements Al are distributed at least in the outer region, element M further comprises at least one of elements P, S, and B, wherein at least one of elements P, S, and B is distributed in the outer region; and
the electrolyte comprises a first additive and a third additive, wherein the first additive comprises at least one of lithium difluoroxalate borate LiDFOB and lithium tetrafluoroborate LiBF4, the third additive comprises lithium fluorosulfonate.