US 12,435,431 B2
Metal porous sheet, fuel cell, and water electrolysis device
Koma Numata, Osaka (JP); Masatoshi Majima, Osaka (JP); Mitsuyasu Ogawa, Osaka (JP); Takahiro Higashino, Osaka (JP); Kazuki Okuno, Osaka (JP); and Hiromasa Tawarayama, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/251,889
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Apr. 6, 2020, PCT No. PCT/JP2020/015526
§ 371(c)(1), (2) Date Dec. 14, 2020,
PCT Pub. No. WO2020/235237, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 2019-096228 (JP), filed on May 22, 2019.
Prior Publication US 2021/0119229 A1, Apr. 22, 2021
Int. Cl. C25B 11/031 (2021.01); C25B 1/04 (2021.01); C25B 9/17 (2021.01); C25B 9/23 (2021.01); C25B 9/65 (2021.01); H01M 8/0232 (2016.01); H01M 8/026 (2016.01); H01M 8/12 (2016.01)
CPC C25B 11/031 (2021.01) [C25B 1/04 (2013.01); C25B 9/17 (2021.01); C25B 9/23 (2021.01); C25B 9/65 (2021.01); H01M 8/026 (2013.01); H01M 8/0232 (2013.01); H01M 2008/1293 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A water electrolysis device comprising:
a metal porous sheet comprising:
a metal porous body having a skeleton with a three-dimensional network structure,
the metal porous sheet having a first main surface and a second main surface which is opposite to the first main surface, and
at least one trench being formed only in the first main surface; and an interconnector arranged to face the first main surface, wherein:
a depth of the at least one trench being more than or equal to 10 percent of a thickness of the metal porous sheet and less than or equal to 90 percent of the thickness of the metal porous sheet,
an area of the at least one trench more than or equal to 10 percent of an area of the main surface in a plan view,
the skeleton has a skeleton main body formed of a metal material and an internal space defined by the skeleton main body, and there is a pore defined by the skeleton in the metal porous body,
the at least one trench extends across an entirety of the metal porous sheet,
the at least one trench is configured to intersect a direction of an aqueous solution supplied through the water electrolysis device such that the aqueous solution crosses in a direction orthogonal to a length of the at least one trench, and
wherein all trenches on the metal porous sheet only extend in the same direction.