US 12,136,728 B2
Lithium metal anode, method for manufacturing same, and lithium secondary battery using same
Hongyoul Bae, Pohang-si (KR); Jin Hong Kim, Pohang-si (KR); Sihwa Lee, Pohang-si (KR); Weon Soo Bae, Pohang-si (KR); and Sang Lag Lee, Pohang-si (KR)
Assigned to POSCO HOLDINGS INC., Seoul (KR); and RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR)
Appl. No. 17/292,549
Filed by POSCO, Pohang-si (KR); and RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY, Pohang-si (KR)
PCT Filed Jul. 9, 2019, PCT No. PCT/KR2019/008436
§ 371(c)(1), (2) Date May 10, 2021,
PCT Pub. No. WO2020/096164, PCT Pub. Date May 14, 2020.
Claims priority of application No. 10-2018-0136753 (KR), filed on Nov. 8, 2018.
Prior Publication US 2022/0149347 A1, May 12, 2022
Int. Cl. H01M 4/134 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/134 (2013.01) [H01M 4/045 (2013.01); H01M 4/0452 (2013.01); H01M 4/1395 (2013.01); H01M 4/366 (2013.01); H01M 4/382 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lithium metal anode, comprising
a current collector having a flat structure, and
an anode active material layer including a lithium metal disposed on the current collector, and
the lithium metal has a concavo-convex structure,
wherein no dendrite is present on the surface of the lithium metal,
provided that the dendrite refers to a particle in which a ratio of the longest length of the particle in one direction and a length in the direction perpendicular to the longest length of the particle is greater than or equal to 3,
wherein based on a planar projection area of the lithium metal, the lithium metal has pores of 5% to 30% with respect to an entire planar projection area,
wherein a depth of the concavo-convex structure in a thickness direction is 20% to 100% based on total thickness of lithium metal,
wherein a minimum depth of the concavo-convex structure in a thickness direction is 20% to 50%, and
wherein a maximum depth of the concavo-convex structure in a thickness direction is 100%.