	US 12,261,283 B2
	Anode pre-lithiation-pre-sodiation method, pre-lithiated and pre-sodiated anode, and lithium secondary battery comprising same
Oh-Byong Chae, Daejeon (KR); Ye-Ri Kim, Daejeon (KR); and Seung-Hae Hwang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/635,224
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Sep. 4, 2020, PCT No. PCT/KR2020/011993 § 371(c)(1), (2) Date Feb. 14, 2022, PCT Pub. No. WO2021/045583, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10-2019-0110945 (KR), filed on Sep. 6, 2019.
Prior Publication US 2022/0293910 A1, Sep. 15, 2022
Int. Cl. H01M 4/139 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01)

CPC H01M 4/139 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0416 (2013.01); H01M 4/0471 (2013.01); H01M 2004/027 (2013.01)]

9 Claims

1. A method for pre-lithiation and pre-sodiation of a negative electrode, comprising:

preparing a negative electrode comprising a negative electrode current collector, and a negative electrode active material layer on at least one surface of the negative electrode current collector;

applying and drying a first composition comprising a lithium metal powder, a polymer binder and a dispersion medium onto the negative electrode active material layer to form a lithium metal layer;

applying and drying a second composition comprising a sodium metal powder, a polymer binder and a dispersion medium onto the lithium metal layer to form a sodium metal layer; and

dipping the negative electrode having the lithium metal layer and the sodium metal layer in an electrolyte for pre-lithiation and pre-sodiation.