Fuel cell

Patent metadata

Field	Value
Publication number	US-10727494-B2
Application number	US-201815903858-A
Country	US
Kind code	B2
Filing date	Feb 23, 2018
Priority date	Mar 27, 2017
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A solid oxide fuel cell is disclosed herein. The fuel cell includes a silicon substrate, an electrolyte film laminated on the silicon substrate, and a gas flow path formed inside the silicon substrate. The electrolyte film is opposed to the gas flow path via an electrode film. A portion of a side wall of the gas flow path has a fillet shape, and the portion is close to the electrolyte film.

First claim

What is claimed is:

1. A solid oxide fuel cell comprising:
a silicon substrate;
an electrolyte film laminated on the silicon substrate; and
a gas flow path formed inside the silicon substrate,
wherein the electrolyte film is a planar shape lying in a single plane, and is opposed to the gas flow path via an electrode film, and
wherein a portion of a side wall of the gas flow path has a fillet shape, and the portion is at an upper end of the gas flow path,
an inclination angle of the portion of the side wall of the gas flow path having the fillet shape with respect to the electrolyte film gradually changes, and
an inclination angle of the side wall of the gas flow path with respect to the single plane of the electrolyte film is 90 degrees at a position below the portion of the side wall of the gas flow path having the fillet shape.

2. The fuel cell according to claim 1 , wherein in a plan view of the silicon substrate, the portion of the side wall of the gas flow path having the fillet shape extends over an entire circumference of the gas flow path.

3. The fuel cell according to claim 1 , wherein a radius of curvature of the portion of the side wall of the gas flow path having the fillet shape is within a range of 1 μm to 10 μm.

4. The fuel cell according to claim 2 , wherein a radius of curvature of the portion of the side wall of the gas flow path having the fillet shape is within a range of 1 μm to 10 μm.

Assignees

• Toyota Chuo Kenkyusho Kk

Inventors

• Akashi Teruhisa
• Funabashi Hirofumi
• Iguchi Hiroko
• Matsuo Hidehito
• Hori Shigeo

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M8/1226

  characterised by the supporting layer · CPC title

• H01M8/026 Primary

  characterised by grooves, e.g. their pitch or depth · CPC title

• H01M4/8621

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

• H01M8/1286

  Fuel cells applied on a support, e.g. miniature fuel cells deposited on silica supports · CPC title