US 11,855,286 B2
Cathode for all-solid-state battery
Sang Baek Park, Seoul (KR); Byung Kook Kim, Seoul (KR); Jong Ho Lee, Seoul (KR); Ji Won Son, Seoul (KR); Kyung Joong Yoon, Seoul (KR); Hyoung Chul Kim, Seoul (KR); Ho Il Ji, Seoul (KR); Sung Eun Yang, Seoul (KR); Seung Hwan Lee, Seoul (KR); and Joo Sun Kim, Seoul (KR)
Assigned to Korea Institute of Science and Technology, Seoul (KR)
Filed by KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, Seoul (KR)
Filed on Nov. 27, 2020, as Appl. No. 17/105,943.
Claims priority of application No. 10-2020-0138362 (KR), filed on Oct. 23, 2020.
Prior Publication US 2022/0131142 A1, Apr. 28, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/505 (2010.01); H01M 4/131 (2010.01); H01M 10/0562 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 4/134 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A cathode thin film for an all-solid-state battery comprising a grain containing Li and Mn,
wherein the grain comprises;
a first plane disposed on the upper side and having a polygonal shape; and
a plurality of second planes having a polygonal shape including at least one of an edge and a vertex of the first plane,
wherein the plurality of second planes have a crystal orientation that differs from the first plane, and are disposed adjacent to each other and are inclined in a thickness direction to surround the periphery of the first plane, and
wherein the grain suppresses dissolution and diffusion of the Mn; and
wherein the grain comprises a compound represented by Formula 1 below:
LiaNibMcNdLeOx  [Formula 1]
wherein M represents one or two elements selected from Mn and Co;
N represents one or two or more elements selected from the group consisting of Mg, Al, Ti, Cr, and Fe; and
L represents one or two or more elements selected from the group consisting of B, C, Na, Si, P, S, K, Ca, and Ba; and
a, b, c, d, e, and x satisfy the following requirements of a/(b+c+d) is 0.80 to 1.30, b/(b+c+d) is 0 to <0.65, c/(b+c+d) is 0.05 to 1, d/(b+c+d) is 0 to 0.10, e/(b+c+d) is 0 to 0.010, b+c+d is 1 or 2, and x is 1.5 to 4; and
wherein the cathode thin film for an all-solid-state battery is a thin film including a grain predominantly including an exposed grain plane having a minimum surface energy.