Porous body, current collector including the same, and fuel cell

Patent metadata

Field	Value
Publication number	US-2020350600-A1
Application number	US-201916627672-A
Country	US
Kind code	A1
Filing date	Apr 25, 2019
Priority date	Jun 21, 2018
Publication date	Nov 5, 2020
Grant date	—

Abstract

A porous body with a framework having an integrally continuous, three-dimensional network structure, the framework comprising an outer shell and a core including one or both of a hollow or a conductive material, the outer shell including nickel and cobalt, the cobalt having a ratio in mass of 0.2 or more and 0.4 or less or 0.6 or more and 0.8 or less relative to the total mass of the nickel and the cobalt.

First claim

1 . A porous body with a framework having an integrally continuous, three-dimensional network structure,
the framework comprising an outer shell and a core including one or both of a hollow or a conductive material, the outer shell including nickel and cobalt, the cobalt having a ratio in mass of 0.2 or more and 0.4 or less or 0.6 or more and 0.8 or less relative to the total mass of the nickel and the cobalt.

2 . The porous body according to claim 1 , wherein the outer shell further includes at least one additive element selected from the group consisting of nitrogen, sulfur, fluorine, and chlorine, and the additive element is 5 ppm or more and 10,000 ppm or less.

3 . The porous body according to claim 1 , wherein the outer shell further includes phosphorus as an additive element, and the additive element is 5 ppm or more and 50,000 ppm or less.

4 . The porous body according to claim 1 , wherein the outer shell further includes at least two or more additive elements selected from the group consisting of nitrogen, sulfur, fluorine, chlorine, and phosphorus, and the total of the additive elements is 5 ppm or more and 50,000 ppm or less.

5 . The porous body according to claim 1 , wherein the outer shell further includes oxygen.

6 . The porous body according to claim 5 , wherein the oxygen is 0.1% by mass or more and 35% by mass or less.

7 . The porous body according to claim 1 , wherein the outer shell includes a spinel-type oxide.

8 . The porous body according claim 1 , wherein when the outer shell is observed in cross section at a magnification of 3,000 times to obtain an image, the image presents in any area 10 μm square thereof five or less voids each having a longer diameter of 1 μm or more.

9 . The porous body according to claim 1 , wherein the core is hollow.

10 . The porous body according to claim 1 , wherein the porous body has a sheet-shaped external appearance and has a thickness of 0.2 mm or more and 2 mm or less.

11 . A current collector comprising the porous body according to claim 1 .

12 . A fuel cell comprising the current collector according to claim 11 .

Assignees

• Sumitomo Electric Industries

Inventors

• Numata Koma
• Majima Masatoshi

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M8/0245

  in the form of layered or coated products · CPC title

• H01M8/0232 Primary

  Metals or alloys · CPC title

• C22C1/08

  Alloys with open or closed pores · CPC title

• C22C19/03

  based on nickel · CPC title