US 12,224,426 B2
Positive electrode for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same
Kiyong Ahn, Yongin-si (KR); Taehee Kwak, Yongin-si (KR); Jeuk Ha, Yongin-si (KR); Seonyoung Kwon, Yongin-si (KR); Yumi Song, Yongin-si (KR); Eunok Oh, Yongin-si (KR); Soonrewl Lee, Yongin-si (KR); and Naoyuki Hase, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Jun. 5, 2023, as Appl. No. 18/329,199.
Application 18/329,199 is a continuation of application No. 17/186,502, filed on Feb. 26, 2021, granted, now 11,728,473.
Claims priority of application No. 10-2020-0124255 (KR), filed on Sep. 24, 2020.
Prior Publication US 2023/0317923 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); C01G 53/00 (2006.01); H01M 4/02 (2006.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [C01G 53/42 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2002/52 (2013.01); C01P 2002/72 (2013.01); C01P 2002/74 (2013.01); C01P 2004/03 (2013.01); C01P 2004/50 (2013.01); C01P 2004/53 (2013.01); C01P 2004/61 (2013.01); C01P 2006/10 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A positive electrode for a rechargeable lithium battery, the positive electrode comprising:
a positive active material, comprising
small particle diameter monolith particles having a particle diameter of about 1 μm to about 8 μm and comprising a first nickel-based lithium metal oxide, and
large particle diameter secondary particles having a particle diameter of about 10 μm to about 20 μm and comprising a second nickel-based lithium metal oxide,
wherein the large particle diameter secondary particles are a compound represented by Chemical Formula 1:
LiaNixQ11-xO2, and  Chemical Formula 1
wherein, in Chemical Formula 1,
0.9≤a≤1.05, 0.9≤x≤0.98, and Q1 is at least one element selected from Co, Mn, Al, Cr, Fe, Ca, B, V, Mg, Nb, Rb, Mo, Ta, W, Cu, Zn, Ga, In, La, Ce, Pr, Sn, Zr, Te, Ru, Ti, Pb, and Hf,
wherein an X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3.