US 12,107,259 B2
Negative electrode comprising a protective layer for a lithium secondary battery, method for manufacturing same, and lithium secondary battery including same
Eunkyung Park, Daejeon (KR); Minchul Jang, Daejeon (KR); Taeseup Song, Seoul (KR); Seho Sun, Seoul (KR); Dongsoo Lee, Daejeon (KR); and Byoungkuk Son, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR); and IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY), Seoul (KR)
Appl. No. 17/257,615
Filed by LG CHEM, LTD., Seoul (KR); and IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY), Seoul (KR)
PCT Filed Mar. 5, 2020, PCT No. PCT/KR2020/003125
§ 371(c)(1), (2) Date Jan. 4, 2021,
PCT Pub. No. WO2020/184900, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10-2019-0026807 (KR), filed on Mar. 8, 2019; and application No. 10-2020-0027055 (KR), filed on Mar. 4, 2020.
Prior Publication US 2021/0273217 A1, Sep. 2, 2021
Int. Cl. H01M 4/1395 (2010.01); C23C 8/02 (2006.01); C23C 8/48 (2006.01); C23F 1/32 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/1395 (2013.01) [C23C 8/02 (2013.01); C23C 8/48 (2013.01); C23F 1/32 (2013.01); H01M 4/0402 (2013.01); H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery comprising:
a lithium metal layer; and
a protective layer on at least one side of the lithium metal layer,
wherein the protective layer comprises a three-dimensional structural body, and
wherein the three-dimensional structural body comprises a frame made of metal and lithium nitride.
 
6. A method for manufacturing a negative electrode for a lithium secondary battery comprising the steps of:
a first step of forming a metal hydroxide having a three-dimensional structure by immersing a metal in an etching solution;
a second step of forming a metal nitride having a three-dimensional structure by a nitridation reaction of the metal hydroxide of the three-dimensional structure; and
a third step of transferring the metal nitride having the three-dimensional structure onto a lithium metal layer to form a protective layer, wherein the protective layer comprises a three-dimensional structural body comprising a frame made of metal and lithium nitride.