Highly porous anode catalyst layer structures for fuel flexible solid oxide fuel cells

Patent metadata

Field	Value
Publication number	US-10637070-B2
Application number	US-201815882376-A
Country	US
Kind code	B2
Filing date	Jan 29, 2018
Priority date	Jan 29, 2018
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An anode may be coated with a catalyst layer to improve solid oxide fuel cell (SOFC) efficiency and provide lower operating temperatures. The catalyst layer may be highly porous and may be a core-shell structure or a layered structure. The catalyst layer may be deposited on the anode as a nanoframe structure or a cage structure.

First claim

What is claimed is:

1. A solid oxide fuel cell, comprising:
a current collector;
a solid electrolyte layer; and
an anode comprising:
yttria stabilized zirconia (YSZ) extending between the current collector and the solid electrolyte layer;
nickel (Ni) deposited on the YSZ; and
a core-shell structure catalyst material coating deposited onto the YSZ and Ni comprising a first portion in contact with the current collector and a second portion in contact with the solid electrolyte layer, wherein the core-shell structure catalyst material coating comprises a Pt—Ni core and an outer shell.

2. The solid oxide fuel cell of claim 1 , wherein the Pt—Ni core forms a random alloy.

3. The solid oxide fuel cell of claim 1 , wherein the Pt—Ni core forms an intermetallic structure.

4. The solid oxide fuel cell of claim 1 , wherein the outer shell is 3-5 atoms in thickness.

5. The solid oxide fuel cell of claim 1 , wherein the outer shell is Pt, Pd, Au, or Ag.

6. The solid oxide fuel cell of claim 1 , wherein the outer shell is porous.

7. The solid oxide fuel cell of claim 6 , wherein the outer shell has a pore diameter of 2 nm to 50 nm.

8. The solid oxide fuel cell of claim 7 , wherein the core-shell structure catalyst material coating is deposited onto the YSZ and Ni as a cage structure.

9. The solid oxide fuel cell of claim 7 , wherein the core-shell structure catalyst material coating is deposited onto the YSZ and Ni as a nanoframe structure.

10. The solid oxide fuel cell of claim 7 , wherein the core-shell structure catalyst material coating is deposited onto the YSZ and Ni as a random porous structure.

Assignees

• Nissan North America Inc

Inventors

• Gumeci Cenk
• Thompson David

Classifications

• H01M8/1213 Primary

  characterised by the electrode/electrolyte combination or the supporting material · CPC title

• H01M4/8621

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

• H01M4/9058 Primary

  of noble metals or noble-metal based alloys · CPC title

• H01M2004/8684

  Negative electrodes · CPC title

• H01M2008/1293

  Fuel cells with solid oxide electrolytes · CPC title