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High specific power solid oxide fuel cell stack

A fuel cell stack, solid oxide technology, used in fuel cells, solid electrolyte fuel cells, components of fuel cells, etc.

Inactive Publication Date: 2009-04-22
UNITED TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at temperatures less than 600 °C, Ce 4+ to Ce 3+ The reduction is minimal and negligible in the fuel cell operating environment in the temperature range of 500-600°C

Method used

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  • High specific power solid oxide fuel cell stack
  • High specific power solid oxide fuel cell stack
  • High specific power solid oxide fuel cell stack

Examples

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Embodiment Construction

[0017] FIG. 1 shows a ceria-based solid oxide fuel cell (SOFC) 10 that generally includes a metal support structure 11 and a thick film three-layer cell 14 . The metal support structure 11 generally includes a rigidized foil support (RFS) 12 , a metal joint 22 and a cathode interconnect 24 . RFS 12 supports cell 14 and includes support sheet 16 , separator sheet 18 and anode interconnect 20 . The RFS structure 12 and cell 14 of the SOFC 10 form a very compact and lightweight structure with an overall thickness of between about 0.04 millimeters (mm) and about 0.06 mm. SOFC 10 with metallic support structure 11 is capable of operating at temperatures below approximately 600 degrees Celsius (°C), allowing for a higher potential power coefficient, low-cost manufacturing techniques, use of cost-effective materials, robustness, durability and Fast boot time.

[0018] SOFC 10 has increased durability and the ability to operate for over 40,000 hours. Due to its lightweight construc...

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Abstract

A metallic, rigidized foil support structure (11) supports a cell (14) of a solid oxide fuel cell (10). The support structure (11) includes a separator sheet (18), a support sheet (16) having perforations (26) configured to communicate a fluid, and a porous layer (20) positioned between the separator sheet (18) and the support sheet (16). The porous layer (20) provides support and reinforcement to the support structure (11) as well as an electrical connection between the support sheet (16) and the separator sheet (18). Fuel flows through the porous layer (20).

Description

Background technique [0001] Solid oxide fuel cell (SOFC) development has historically focused on high operating temperatures (900-1000° C.), and attempts have been made to make SOFCs integrated into large-scale stable power plants. The steam generated by the high operating temperature is used to drive endothermic fuel process reactions through a heat exchanger, and is also typically directed to a turbine in order to generate more electricity, increasing the overall efficiency of the stable power generation unit. Furthermore, SOFCs do not require pure hydrogen to work and can operate on carbon monoxide-producing hydrocarbon fuels that serve as fuel to the electrodes in the fuel cell. [0002] Current SOFCs typically require operation at high operating temperatures in order to reach temperatures at which yttria-stabilized zirconia (YSZ) electrolytes, commonly used in SOFCs, are sufficiently conductive. Due to the high operating temperatures required to operate SOFCs, some SOFC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/18
CPCH01M8/0228H01M8/0247Y02E60/521H01M8/0232Y02E60/525H01M8/1226H01M8/0245H01M8/021H01M2008/1293H01M8/2425Y02E60/50H01M8/2483H01M8/2432H01M8/02H01M8/12
Inventor J·雅马尼斯
Owner UNITED TECH CORP
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