US 12,355,078 B2
Rechargeable lithium battery
Pilsang Yun, Yongin-si (KR); Do-Yu Kim, Yongin-si (KR); Hyunbeom Kim, Yongin-si (KR); Sangin Park, Yongin-si (KR); and Yongchan You, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
Filed on Dec. 1, 2022, as Appl. No. 18/060,684.
Prior Publication US 2023/0178725 A1, Jun. 8, 2023
Int. Cl. H01M 4/525 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/62 (2006.01); H01M 10/0569 (2010.01); H01M 10/44 (2006.01); H01M 50/46 (2021.01); H01M 50/578 (2021.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/62 (2013.01); H01M 10/0569 (2013.01); H01M 10/445 (2013.01); H01M 10/448 (2013.01); H01M 50/46 (2021.01); H01M 50/578 (2021.01); H01M 2004/028 (2013.01); H01M 2300/0051 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A rechargeable lithium battery, comprising:
a positive electrode comprising a positive electrode active material comprising a secondary particle in which a plurality of primary particles are aggregated, the secondary particle having at least a portion of the primary particles radially arranged and comprising a lithium nickel-based composite oxide, and a boron coating layer on the surface of the secondary particle and comprising lithium borate;
a negative electrode;
a separator between the positive electrode and the negative electrode;
an electrolyte comprising vinylene carbonate; and
a case containing the positive electrode, the negative electrode, the separator, and the electrolyte; and
a boron doping layer located inside the primary particle exposed on the surface of the secondary particle.