Cathode current collector for solid oxide fuel cell, and solid oxide fuel cell comprising same

Patent metadata

Field	Value
Publication number	US-2017005345-A1
Application number	US-201415107262-A
Country	US
Kind code	A1
Filing date	Dec 24, 2014
Priority date	Dec 26, 2013
Publication date	Jan 5, 2017
Grant date	—

Abstract

The present invention relates to a cathode current collector for a solid oxide fuel cell and, more particularly, to a cathode current collector inserted between a cell and a metal separator constituting a unit of a fuel cell stack, and a solid oxide fuel cell comprising the same.

First claim

1 . A cathode current collector for a solid oxide fuel cell,
wherein the cathode current collector is a porous metal foam having pores, wherein the metal foam is formed of one, two or more types of binary alloys consisting of CoNi, CoMn and CuMn, or one or two types of ternary alloys consisting of CoNiMn and CoCuMn.

2 . The cathode current collector for a solid oxide fuel cell of claim 1 , wherein Co, Cu, Ni and Mn forming the metal foam have compositions of Co:Ni or Co:Mn, where Cu:Mn=1:9 to 9:1.

3 . The cathode current collector for a solid oxide fuel cell of claim 1 , wherein the metal foam has density of 200 g/m 2 to 1000 g/m 2 .

4 . A method for manufacturing a cathode current collector for a solid oxide fuel cell that includes a cathode, an anode, an electrolyte and a separator, the method comprising:
preparing a polymer foam; depositing a metal on a surface of the polymer foam; coating a metal mixture of two or more types of metal among Co, Cu, Ni and Mn on a top of the deposited metal; reduction heat treating the result after the coating; and preparing a metal foam by removing the polymer foam after the reduction heat treatment, wherein the metal foam is one or more types of CoNi, CoMn, CuMn, CoNiMn and CoCuMn.

5 . The method for manufacturing a cathode current collector for a solid oxide fuel cell of claim 4 , wherein the metal is one or more of Ni, Cu and Co.

6 . The method for manufacturing a cathode current collector for a solid oxide fuel cell of claim 4 , wherein the coating of mixed metals is carried out by electroplating or powder coating.

7 . The method for manufacturing a cathode current collector for a solid oxide fuel cell of claim 4 , wherein the reduction heat treatment is carried out at 500° C. to 1000° C.

8 . The method for manufacturing a cathode current collector for a solid oxide fuel cell of claim 4 , wherein the reduction heat treatment is carried out under a mixed gas atmosphere of hydrogen and nitrogen, or hydrogen and argon.

9 . A solid oxide fuel cell comprising a cathode, an anode, an electrolyte and a separator, the fuel cell further comprising:
a cathode current collector between the cathode and the separator, wherein the cathode current collector is a porous metal foam having pores,
and the metal foam is formed of one, two or more types of binary alloys consisting of CoNi, CoMn and CuMn, or one or two types of ternary alloys consisting of CoNiMn and CoCuMn.

10 . The solid oxide fuel cell of claim 9 , wherein the cathode current collector is transformed into a conductive ceramic after high temperature oxidation.

Assignees

• Res Inst Ind Science & Tech
• Alantum Corp

Inventors

• Lee In-Sung
• Park Man-Ho
• Jun Jae-Ho
• Park Chi-Rok
• Kim Bum-Soo
• Lee Chang-Woo
• Choi Sung-Hwan

Classifications

• C25D3/12

  of nickel or cobalt · CPC title

• H01M4/8621

  containing only metallic or ceramic material, e.g. made by sintering or sputtering · CPC title

• C25D1/08

  Perforated or foraminous objects, e.g. sieves (C25D1/10 takes precedence) · CPC title

• C25D3/562

  containing more than 50% by weight of iron or nickel or cobalt · CPC title

• C25D5/50

  by heat-treatment · CPC title