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High performance fuel cell electrode and method for manufacturing same

A technology for fuel cells and supporting electrodes, which is applied in the directions of fuel cells, battery electrodes, fuel cell components, etc., and can solve problems such as reducing the performance of fuel cells.

Inactive Publication Date: 2006-06-21
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation on mass transfer has a significant impact on the efficiency of the fuel cell as concentration polarization will greatly reduce the fuel cell performance in terms of high fuel and / or air utilization

Method used

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  • High performance fuel cell electrode and method for manufacturing same
  • High performance fuel cell electrode and method for manufacturing same
  • High performance fuel cell electrode and method for manufacturing same

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Embodiment Construction

[0020] Figure 1 shows a conventional single solid oxide fuel cell 10 used to form a SOFC stack. Cell 10 includes a layered anode 12 and a cathode 14 sandwiching an electrolyte 16 . The electrolyte is in contact with the cathode 14 and the first adjacent layer 18 of the anode. A thicker second anode layer 20 joins the other side of the first anode layer 18 . Anode 12 may comprise nickel and YSZ (yttria stabilized zirconia). Anode 12 was fabricated such that first anode layer 18 had approximately 60 volume percent NiO and second anode layer 20 had approximately 80 volume percent NiO. The second anode layer 20 also has greater porosity, allowing for easier transport of reactant gases.

[0021] figure 2 A method of preparing a supporting electrode, preferably an anode, according to an exemplary embodiment of the present invention is shown. Specifically, anode 22 is a layered anode similar to anode 12 , including a relatively thick layer 24 and a relatively thin layer 26 . El...

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Abstract

A method of making a support electrode (22) for a solid oxide fuel cell comprising (a) providing a solid support electrode having an upper surface (24), the solid electrode comprising a non-conductive material and a conductive material; (b) Apply a mask (29) on said upper surface (24) to form a desired uncovered pattern on said top surface; (c) remove a desired amount of material from the uncovered pattern to achieve a predetermined depth of the support electrode; and (d) removing the mask.

Description

technical field [0001] The present invention relates to the preparation of high-performance solid oxide fuel cells (SOFCs), and in particular, the present invention relates to methods of manufacturing electrode-supported fuel cells. Background technique [0002] A fuel cell is a device that electrochemically converts chemical energy into electrical energy. Currently, solid oxide fuel cells have two basic unit cell structures: electrolyte-supported cells and electrode-supported cells. In some planar SOFCs with electrolyte-supported cells, the electrolyte is the mechanical support structure of the cell and its thickness is typically between 150 and 250 μm. In electrode-supported cells, the supporting electrode provides the current path, mass transfer, and mechanical strength. In general, features and / or properties of SOFC support electrodes include conductive features, oxide ion conducting features, and porosity. In addition, the supporting electrode has a considerable thic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M8/10
CPCH01M4/8621H01M4/8885H01M4/9016H01M8/1213H01M8/1226H01M8/1286Y02E60/50Y02P70/50H01M4/88H01M8/02H01M8/2432
Inventor J·关D·翁V·阿加沃尔X·齐
Owner GENERAL ELECTRIC CO