Inactive end cell assembly for fuel cells for improved electrolyte management and electrical contact

A fuel cell and fuel cell stack technology, which is applied to molten electrolyte fuel cells, fuel cell grouping, fuel cell components, etc., can solve the problem that the end cell structure cannot prevent the increase of electrolyte migration resistance.

Inactive Publication Date: 2006-01-11
FUELCELL ENERGY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrolyte migration and corresponding increase in resistance cannot be prevented by the terminal cell structure of this patent

Method used

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  • Inactive end cell assembly for fuel cells for improved electrolyte management and electrical contact
  • Inactive end cell assembly for fuel cells for improved electrolyte management and electrical contact
  • Inactive end cell assembly for fuel cells for improved electrolyte management and electrical contact

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Embodiment Construction

[0029] Figure 2 generally shows an end cell assembly at the positive and negative terminals of a fuel cell stack in accordance with the principles of the present invention. As shown, the inactive anode members 12, 22 are positioned adjacent the end plates 14, 24 at the ends of the stack. On the positive or negative side of the fuel cell stack, the end cell 10 further includes a ribbed electrode reservoir 16 separated from an active cathode component 18 by a second inactive anode component 12 . An end cell assembly 20 on the negative or anode side of the stack includes a ribbed electrolyte reservoir 26 adjoining an active anode member 28 . In an end cell configuration at both ends of the stack, the inactive anode component 12, 22 is between the ribbed electrode reservoir 16 or reservoir 26 and the end plates 14, 24, and in the positive terminal cell 10, between the active cathode component 18 and the ribbed electrode reservoir 16 provide a conductive separation interface.

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Abstract

An assembly for storing electrolyte in a carbonate fuel cell is provided. The combination of a soft, compliant and resilient cathode current collector and an inactive anode part including a foam anode in each assembly mitigates electrical contact loss during operation of the fuel cell stack. In addition, an electrode reservoir in the positive end assembly and an electrode sink in the negative end assembly are provided, by which ribbed and flat cathode members inhibit electrolyte migration in the fuel cell stack.

Description

[0001] Refer to related application [0002] This application is a continuation of US Patent Application No. 10 / 329,305 filed December 24,2002. technical field [0003] This invention relates to liquid electrolyte fuel cells, such as molten carbonate fuel cells, and more particularly to end cell assemblies for use at the positive and negative ends of such fuel cell stacks. Background technique [0004] like figure 1 As shown, a fuel cell generally includes an anode and a cathode separated by an electrolyte. An anode current collector is positioned adjacent the anode facing the electrolyte, allowing fuel to pass through the anode current collector. Similarly, a cathode current collector that allows oxygen to pass is positioned adjacent to the cathode and facing the electrolyte. [0005] Fuel cells of this type using carbonates as electrolytes are well known and described in numerous publications and patents. In molten carbonate fuel cells, the carbonate electrolyte compri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/14H01M2/00H01M8/00H01M8/02H01M8/24
CPCH01M8/244H01M8/0254H01M8/145H01M8/0247H01M8/0258H01M8/142Y02E60/526Y02E60/50H01M8/2457
Inventor 喻肇宜霍哈迈德·法鲁克理查德·约翰森
Owner FUELCELL ENERGY INC
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