US 11,909,029 B2
Positive electrode having lithium transition metal oxide containing nickel, cobalt and manganese for secondary battery and secondary battery including the same
Won Sig Jung, Daejeon (KR); Sang Soon Choi, Daejeon (KR); and Hyun Ah Park, Daejeon (KR)
Assigned to LG Chem, Ltd., (KR)
Appl. No. 17/055,012
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed May 21, 2019, PCT No. PCT/KR2019/006051
§ 371(c)(1), (2) Date Nov. 12, 2020,
PCT Pub. No. WO2019/225939, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 10-2018-0057962 (KR), filed on May 21, 2018.
Prior Publication US 2021/0218012 A1, Jul. 15, 2021
Int. Cl. H01M 4/131 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 10/42 (2006.01); H01M 4/36 (2006.01)
CPC H01M 4/131 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/621 (2013.01); H01M 10/052 (2013.01); H01M 10/42 (2013.01); H01M 4/366 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A positive electrode for a secondary battery, comprising:
a positive electrode active material layer which comprises:
a positive electrode active material including a lithium transition metal oxide which contains nickel, cobalt, and manganese and having an atomic ratio of nickel in total transition metals of 80 atm % or more; and
a metal oxide including a metallic element having a binding potential with lithium of 0.5 V to 4 V,
wherein the metal oxide is included in an amount of 0.1 wt % to 2 wt % based on a total weight of the positive electrode active material layer, and
wherein the lithium transition metal oxide has a concentration gradient in which at least one element of the nickel, the cobalt, or the manganese in the lithium transition metal oxide is continuously changed across an entire particle or in a specific region.