US 11,909,028 B2
Cathode for metal-air battery, preparing method thereof, and metal-air battery comprising the same
Hyunpyo Lee, Seoul (KR); Mokwon Kim, Suwon-si (KR); Taeyoung Kim, Seoul (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 Apr. 20, 2020, as Appl. No. 16/852,677.
Claims priority of application No. 10-2019-0132389 (KR), filed on Oct. 23, 2019.
Prior Publication US 2021/0126240 A1, Apr. 29, 2021
Int. Cl. H01M 4/131 (2010.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/131 (2013.01) [H01M 4/0442 (2013.01); H01M 4/0471 (2013.01); H01M 4/134 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/58 (2013.01); H01M 4/621 (2013.01); H01M 4/663 (2013.01); H01M 4/667 (2013.01); H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 2004/021 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A cathode for a metal-air battery, the cathode comprising:
a mixed conductor; and
first pores having a size of about 1 micrometer or greater,
wherein an amount of the first pores is about 30 volume percent to about 95 volume percent, with respect to a total volume of pores in the cathode, and
a total porosity of the cathode is about 70 percent to about 95 percent, based on a total volume of the cathode,
wherein the mixed conductor is a perovskite compound represented by Formula 5:
LixAlyG1zO3−δ  Formula 5
wherein, in Formula 5,
A1 is at least one of La, Ce, Pr, Gd, Ca, Sr, or Ba,
G1 is at least one of Mn, Ru, Cr, Co, Ir, Fe, Pd, Pb, Rh, Sn, V, Re, Ge, W, Mo, Hf, or Bi, and
0.2<x≤0.5, 0.4<y≤0.6, 0<x+y<1, 0.8<z≤1.2, and 0≤δ≤0.4.