US 12,334,517 B2
Rechargeable lithium battery
Jaehwan Ha, Yongin-si (KR); Kijun Kim, Yongin-si (KR); Heeeun Yoo, Yongin-si (KR); Yeonhee Yoon, Yongin-si (KR); and Kyuseo Lee, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on May 24, 2023, as Appl. No. 18/323,320.
Application 18/323,320 is a continuation of application No. 16/460,779, filed on Jul. 2, 2019, granted, now 11,705,585.
Claims priority of application No. 10-2018-0077138 (KR), filed on Jul. 3, 2018.
Prior Publication US 2023/0299367 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/42 (2006.01); H01M 4/02 (2006.01); H01M 4/13 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 50/46 (2021.01)
CPC H01M 10/4235 (2013.01) [H01M 4/13 (2013.01); H01M 4/525 (2013.01); H01M 4/622 (2013.01); H01M 10/052 (2013.01); H01M 50/46 (2021.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A rechargeable lithium battery, comprising:
a negative electrode comprising a negative current collector, a negative active material layer on the negative current collector, and a negative functional layer on the negative active material layer; and
a positive electrode comprising a positive electrode current collector and a positive active material layer on the positive electrode current collector,
wherein the negative functional layer comprises flake-shaped polyethylene particles, and
the positive active material layer comprises a first positive active material comprising one or more composite oxides of lithium and a metal selected from cobalt, manganese, nickel, and a combination thereof, and a second positive active material comprising a compound represented by Chemical Formula 1:
LiaFe1-xMxPO4   Chemical Formula 1
wherein, in Chemical Formula 1, 0.90≤a≤1.8, 0≤x≤0.7, and M is Mg, Co, Ni, or a combination thereof,
wherein the flake-shaped polyethylene particles have a ratio of a major axis length to a minor axis length of 1 to 5,
wherein the flake-shaped polyethylene particles have an average particle size (D50) of 1 μm to 8 μm, and
wherein the flake-shaped polyethylene particles have a thickness of 0.2 μm to 0.6 μm.