Gas decomposition device and power generation device

Patent metadata

Field	Value
Publication number	US-2017077526-A1
Application number	US-201515309242-A
Country	US
Kind code	A1
Filing date	May 15, 2015
Priority date	May 26, 2014
Publication date	Mar 16, 2017
Grant date	—

Abstract

A gas decomposition device 100 includes one or two or more membrane electrode assemblies 5, each including a solid electrolyte layer 2, an anode layer 3 stacked on a first side of the solid electrolyte layer 2, and a cathode layer 4 stacked on a second side of the solid electrolyte layer; and porous current collectors 8 a, 8 b, and 8 c including continuous pores 1 b, the membrane electrode assemblies being stacked with the porous current collector, the solid electrolyte layer being composed of a proton-conducting solid electrolyte, the porous current collectors including porous metal bodies 1, each of the porous metal bodies 1 including an alloy layer 12 a having corrosion resistance on at least a surface of the porous metal body 1 facing the continuous pores, and the porous metal bodies forming gas channels 9 a, 9 b, and 9 c that supply gases to the anode layer and the cathode layer.

First claim

1 . A gas decomposition device comprising:
one or two or more membrane electrode assemblies, each including a solid electrolyte layer, an anode layer stacked on a first side of the solid electrolyte layer, and a cathode layer stacked on a second side of the solid electrolyte layer; and a porous current collector including continuous pores, the membrane electrode assemblies being stacked with the porous current collector, the solid electrolyte layer being composed of a proton-conducting solid electrolyte, the porous current collector including a porous metal body that includes an alloy layer having corrosion resistance on at least a surface of the porous metal body facing the continuous pores, and the porous metal body forming a gas channel that supplies a gas to the anode layer and the cathode layer.

2 . The gas decomposition device according to claim 1 , wherein the alloy layer is composed of a nickel (Ni)-tin (Sn) alloy and has a tin content of 10% to 20% by mass.

3 . The gas decomposition device according to claim 1 , wherein a portion of the porous metal body adjacent to the cathode layer stacked on the porous metal body has a higher tin content than a portion of the porous metal body adjacent to the anode layer stacked on the porous metal body.

4 . The gas decomposition device according to claim 1 , wherein the porous metal body has a porosity of 30% to 98% and a pore size of 0.1 mm or more and 1 mm or less.

5 . The gas decomposition device according to claim 1 , wherein a portion of the porous metal body adjacent to the cathode layer stacked on the porous metal body has higher porosity than a portion of the porous metal body adjacent to the anode layer stacked on the porous metal body.

6 . The gas decomposition device according to claim 1 , wherein a portion of the porous metal body adjacent to the cathode layer stacked on the porous metal body has larger pore size than a portion of the porous metal body adjacent to the anode layer stacked on the porous metal body.

7 . The gas decomposition device according to claim 1 , wherein a gas inflow side of the porous metal body has a smaller pore size than the other portion of the porous metal body.

8 . The gas decomposition device according to claim 1 , wherein the porous metal body includes a skeleton that includes a shell portion and a core portion, the core portion containing one or both of a hollow portion and a conductive material, and wherein the skeleton has a three-dimensional mesh-like structure having an integrated continuous form.

9 . The gas decomposition device according to claim 1 , wherein the anode layer has a thickness of 100 μm or more and 1000 μm or less.

10 . The gas decomposition device according to claim 1 , wherein the cathode layer has a thickness of 10 μm or more and 100 μm or less.

11 . A power generation device comprising the gas decomposition device according to claim 1 .

Assignees

• Sumitomo Electric Industries

Inventors

• Hiraiwa Chihiro
• Majima Masatoshi
• Tawarayama Hiromasa
• Mizuhara Naho
• Higashino Takahiro
• Noda Yohei

Classifications

• H01M8/02

  Details (electrodes H01M4/86 - H01M4/98) · CPC title

• H01M8/12

  operating at high temperature, e.g. with stabilised ZrO2 electrolyte · CPC title

• H01M8/00

  Fuel cells; Manufacture thereof · CPC title

• Y02C20/20

  of methane · CPC title

• B01D53/92

  of engine exhaust gases (exhaust {or silencing} apparatus {for internal combustion engines, machines or engines in general}, having means for purifying, {rendering innocuous} or otherwise treating exhaust gases F01N3/00) · CPC title