Printed fuel cell with integrated gas channels

Patent metadata

Field	Value
Publication number	US-9819040-B2
Application number	US-201313746564-A
Country	US
Kind code	B2
Filing date	Jan 22, 2013
Priority date	Nov 29, 2008
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A printed fuel cell having integrated gas channels, and having an anode layer, where a first gas diffusion electrode layer is periodically fixed to the anode layer, wherein the periodically fixed first gas diffusion electrode layer defines hydrogen flow field channels. A first catalyst material is coated or infused to the first gas diffusion electrode layer. An electrolyte membrane covers portions of the anode layer and first gas diffusion electrode layer with the first catalyst material. A second catalyst material is coated or infused to the electrolyte membrane. A second gas diffusion electrode layer is in operative association with the electrolyte membrane and second catalyst material, on a surface of the electrolyte membrane different from a surface of the electrolyte membrane which is in contact with the first gas diffusion electrode layer, and a perforated cathode is in contact with the second gas diffusion electrode layer.

First claim

The invention claimed is:

1. A printed fuel cell, having integrated flow channels comprising:
an anode layer wherein the anode layer is a solid conductive material without through holes;
a first gas diffusion electrode layer periodically fixed to the anode layer, wherein the first gas diffusion electrode layer defines integrated flow channels;
a first catalyst material coated or infused to the first gas diffusion electrode layer;
an electrolyte membrane covering portions of the anode layer and the first gas diffusion electrode layer with the first catalyst material, the electrolyte membrane configured to not have mechanical integrity when formed as a discrete sheet;
a second catalyst material coated or infused to the electrolyte membrane;
a second gas diffusion electrode layer in operative association with the electrolyte membrane and the second catalyst material, on a surface of the electrolyte membrane different from a surface of the electrolyte membrane which is in contact with the first gas diffusion electrode layer; and
a cathode in contact with the second gas diffusion electrode layer,
wherein the integrated flow channels are located between the anode and the cathode, and wherein structural support for the fuel cell is provided substantially entirely by the anode and wherein the printed fuel cell is a monolithic device.

2. The printed fuel cell of claim 1 , wherein a first surface of the electrolyte membrane is non-planar and an entirety of second surface of the electrolyte membrane is planarized.

3. The printed fuel cell of claim 1 , wherein the electrolyte membrane is in contact with the anode through the first gas diffusion electrode layer and the first catalyst material.

4. The printed fuel cell of claim 1 , wherein the fuel cell is a hydrogen fuel cell.

5. The printed fuel cell of claim 1 , wherein at least one of the first and second gas diffusion electrode layers comprises porous conductive material impregnated with hydrophobic material.

6. The printed fuel cell of claim 1 , wherein the electrolyte membrane is a non-crosslinked or heterogeneous ion exchange resin.

7. The printed fuel cell of claim 1 , wherein the cathode is a perforated cathode with through holes arrayed throughout the cathode.

8. The printed fuel cell of claim 1 , wherein the integrated fuel channels each include a layer of approximately 5-10 μm thick carbon black or polytetrafluorethylene surrounding an inside of each of the channels.

9. The printed fuel cell of claim 1 , wherein the monolithic device includes at least one of micro-structures, thin film structures and thick film structures, optimized for high performance.

10. The printed fuel cell of claim 1 , wherein the monolithic device includes at least one of printed structures and spray coated structures.

11. The printed fuel cell of claim 1 , wherein the integrated fuel channels each include a layer of approximately 5-10 μm thick carbon black or polytetrafluorethylene surrounding an inside of each of the channels.

12. The printed fuel cell of claim 1 , wherein the monolithic device includes at least one of micro-structures, thin film structures, and thick film structures optimized for high performance.

13. The printed fuel cell of claim 1 , wherein a structure of the first gas diffusion electrode layer defines the integrated flow channels which are located between a surface of the anode and the first gas diffusion electrode layer, and wherein the structure of the first gas diffusion electrode layer corresponds to a provided sacrificial material.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Littau Karl A

Classifications

• Y02P70/50

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

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/0258

  characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant · CPC title

• H01M8/006

  Flat · CPC title

• H01M8/1007 Primary

  with both reactants being gaseous or vaporised (H01M8/12 takes precedence) · CPC title