US 12,489,110 B2
Positive electrode having excellent alkali resistance, method of manufacturing the same, and metal-air battery and electrochemical device including the positive electrode
Wonsung Choi, Hwaseong-si (KR); Kyounghwan Choi, Suwon-si (KR); Mokwon Kim, Suwon-si (KR); and Hyunpyo Lee, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Mar. 3, 2021, as Appl. No. 17/190,785.
Claims priority of application No. 10-2020-0041707 (KR), filed on Apr. 6, 2020.
Prior Publication US 2021/0313569 A1, Oct. 7, 2021
Int. Cl. H01M 4/48 (2010.01); H01M 4/02 (2006.01); H01M 12/08 (2006.01)
CPC H01M 4/483 (2013.01) [H01M 12/08 (2013.01); H01M 2004/028 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A metal-air battery comprising:
a positive electrode layer including a positive electrode support, a lithium-ion conductive solid electrolyte membrane; and a porous electroconductive metal oxide represented by Formula 1;
a negative electrode layer comprising at least one of a metal or a metal alloy; and
an electrolyte disposed between the positive electrode layer and the negative electrode layer, the electrolyte being a solid electrolyte, a gel electrolyte, or a liquid electrolyte:
wherein the porous electroconductive metal oxide is disposed on the lithium-ion conductive solid electrolyte membrane,
and has a specific surface area of about 3 square meters per gram to about 10 square meters per gram, and a porosity of about 0.2 to about 0.5,
LxRuyOz  Formula 1
wherein, in Formula 1,
L is at least one of a lanthanide element or an actinide element, and
0<x<1, 0<y<1, and 0<z≤1.