US 11,658,306 B2
Cathode, lithium-air battery comprising the same, and method of preparing the cathode
Hyunpyo Lee, Seoul (KR); Taeyoung Kim, Seoul (KR); Mokwon Kim, Suwon-si (KR); and Wonsung Choi, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 21, 2020, as Appl. No. 17/128,305.
Claims priority of application No. 10-2020-0013301 (KR), filed on Feb. 4, 2020.
Prior Publication US 2021/0242469 A1, Aug. 5, 2021
Int. Cl. H01M 4/86 (2006.01); H01M 4/88 (2006.01); H01M 12/08 (2006.01)
CPC H01M 4/8621 (2013.01) [H01M 4/8828 (2013.01); H01M 4/8882 (2013.01); H01M 4/8896 (2013.01); H01M 12/08 (2013.01); H01M 2004/8689 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A cathode configured to use oxygen as a cathode active material, the cathode comprising:
a porous film,
wherein the porous film comprises a metal oxide, and
wherein a surface of the porous film has a root mean square roughness of about 0.01 micrometer to about 1 micrometer, and a porosity of the porous film is about 50 volume percent to about 99 volume percent, based on a total volume of the porous film.