AIR ELECTRODE/SEPARATOR ASSEMBLY AND METAL-AIR SECONDARY BATTERY

WIPO Patent Application WO/2020/246178

A1

The present invention provides an air electrode/separator assembly that exhibits exceptional charging/discharging performance when used as a metal-air secondary battery, despite comprising a hydroxide-ion-conducting dense separator such as an LDH separator. This air electrode/separator assembly comprises: the hydroxide-ion-conducting dense separator; and an air electrode layer provided on one surface side of the hydroxide-ion-conducting dense separator. The air electrode layer comprises: an internal catalyst layer, which is provided on the side near the hydroxide-ion-conducting dense separator, and is filled with a mixture containing a hydroxide ion conductive material, an electrically conductive material, an organic polymer, and an air electrode catalyst (the hydroxide-ion-conducting material can be the same material as the air electrode catalyst, and the electrically conductive material can be the same material as the air electrode catalyst); and an outermost catalyst layer that is provided on the side distant from the hydroxide-ion-conducting dense separator, and is configured of a porous current collector and a layered double hydroxide (LDH) that covers the surface thereof, the outermost catalyst layer having a porosity of 60% or higher.

HASHIMOTO NAOMI (JP)
KANO OZORA (JP)
SAITO NAOMI (JP)

PCT/JP2020/017831

December 10, 2020

April 24, 2020

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NGK INSULATORS LTD (JP)

H01M12/08; H01B1/06; H01B1/10; H01M4/86; H01M4/90

WO2018163353A1	2018-09-13
WO2016084557A1	2016-06-02

JP2017016901A	2017-01-19
JP2019021518A	2019-02-07

TAKAMURA Masaharu et al. (JP)

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