US 12,080,868 B2
Air electrode/separator assembly and metal-air secondary battery
Naomi Hashimoto, Nagoya (JP); Ozora Kano, Nagoya (JP); and Naomi Saito, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK INSULATORS, LTD., Nagoya (JP)
Filed on Oct. 29, 2021, as Appl. No. 17/452,800.
Application 17/452,800 is a continuation of application No. PCT/JP2020/017831, filed on Apr. 24, 2020.
Claims priority of application No. 2019-105742 (JP), filed on Jun. 5, 2019; and application No. 2019-174428 (JP), filed on Sep. 25, 2019.
Prior Publication US 2022/0052399 A1, Feb. 17, 2022
Int. Cl. H01M 12/08 (2006.01); H01M 4/90 (2006.01); H01M 50/449 (2021.01)
CPC H01M 12/08 (2013.01) [H01M 4/9016 (2013.01); H01M 50/449 (2021.01)] 16 Claims
OG exemplary drawing
 
1. An air electrode/separator assembly comprising a hydroxide ion conductive dense separator and an air electrode layer provided on one side of the hydroxide ion conductive dense separator, wherein the air electrode layer comprises:
an internal catalyst layer provided closer to the hydroxide ion conductive dense separator and filled with a mixture comprising a hydroxide ion conductive material, an electron conductive material, an organic polymer, and an air electrode catalyst, provided that the hydroxide ion conductive material may be the same material as the air electrode catalyst, and provided that the electron conductive material may be the same material as the air electrode catalyst, and
an outermost catalyst layer provided away from the hydroxide ion conductive dense separator, composed of a porous current collector and a layered double hydroxide (LDH) covering the surface thereof, and having a porosity of 60% or more.