US 12,355,059 B2
Method of preparing electrode for lithium secondary battery and electrode for lithium secondary battery prepared by using the same
Sol Ji Park, Daejeon (KR); Kyoung Ho Ahn, Daejeon (KR); Jun Hyeok Han, Daejeon (KR); and Chul Haeng Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/288,396
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Oct. 18, 2019, PCT No. PCT/KR2019/013780
§ 371(c)(1), (2) Date Apr. 23, 2021,
PCT Pub. No. WO2020/085726, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0128788 (KR), filed on Oct. 26, 2018.
Prior Publication US 2021/0359287 A1, Nov. 18, 2021
Int. Cl. H01M 4/04 (2006.01); H01M 4/66 (2006.01); H01M 10/0562 (2010.01); H01M 10/0567 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 4/0452 (2013.01) [H01M 4/0404 (2013.01); H01M 4/667 (2013.01); H01M 10/0562 (2013.01); H01M 10/0567 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0028 (2013.01); H01M 2300/0051 (2013.01); H01M 2300/0057 (2013.01); H01M 2300/008 (2013.01)] 18 Claims
 
1. A method of preparing a positive electrode for a lithium secondary battery, comprising:
forming an inorganic electrolyte layer directly on a positive electrode current collector by immersing the positive electrode current collector in a composition for forming the inorganic electrolyte layer and applying a current; and
forming an organic electrolyte layer by immersing the positive electrode current collector having the inorganic electrolyte layer formed thereon in a composition for forming the organic electrolyte layer and applying a current,
wherein
the composition for forming the inorganic electrolyte layer comprises a compound represented by Formula 1:
MM′Xn-m(SO2)  [Formula 1]
M is a metallic element selected from the group consisting of lithium (Li), sodium (Na), potassium (K), and rubidium (Rb),
M′ is a metallic element selected from the group consisting of aluminum (Al), gallium (Ga), indium (In), and titanium (Ti),
X is a halogen element selected from the group consisting of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I),
n is an integer of 1 to 6, and
m is an integer of 1 to 10,
the composition for forming the organic electrolyte layer comprises an organic solvent and a lithium salt, and
the lithium salt includes Li+ as a cation and at least one selected from the group consisting of F−, Cl−, Br−, I−, NO3−, BF4−, ClO4−, AlO4−, AlCl4−, PF6−, SbF6−, AsF6−, BF2C2O4−, BC4O8−, (CF3)2PF4−, (CF3)3PF3−, (CF3)4PF2−, (CF3)5PF−, (CF3)6P−, CF3SO3−, C4F9SO3−, CF3CF2SO3−, CF3CF2(CF3)2CO, (CF3SO2)2CH, CF3(CF2)7SO3−, CF3CO2−, CH3CO2−, SCN−, and mixture thereof.