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Fuel cell

A technology of fuel cells and fuel cell stacks, applied in the field of current collectors, which can solve the problems of damage to electrolytes and anodes, failure to teach how to connect "filaments", complexity, etc.

Active Publication Date: 2011-08-10
CERES INTPROP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method of sealing the electrolyte, cathode and anode with a separator is not taught and if compressive force is used to achieve the seal, damage to the electrolyte and anode is expected to result in reduced lifetime
Furthermore, where the electrolyte and anode are exposed to the outside of the fuel cell, there is no teaching to prevent the flow of hydrogen ions through the electrolyte to the outside of the fuel cell
Furthermore, it is not taught how to connect the large number of "filaments" to the corresponding anodes, cathodes and interconnection plates, and this seems to be a complicated and inconvenient operation

Method used

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Embodiment Construction

[0203] In the first embodiment, the anode 1 a and the covering electrolyte 1 e are arranged to be carried by the metal substrate 4 . The cathode 1c is deposited on the electrolyte by screen printing to form a "wet" layer, and then a current collector in the form of a woven metal mesh 2 is introduced into the wet layer 1c. The current collector can be prefabricated by cutting to the desired size and bending the protruding side of the current collector towards a vertical position. This structure was introduced into the cathode by lightly pressing the current collector into the wet layer 1c. The device is then fired at <1000°C.

[0204] The preformed woven mesh 2 is bonded through the above process, and it is sintered to the cathode 1c of the fuel cell. To complete the assembly of the cell, the extension (protrusion) of the current collector 2 extending beyond the anode 1a, electrolyte 1e and cathode 1c (current collector extension) is held in a vertical position, and a non-con...

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Abstract

The present invention is concerned with a fuel cell comprising : an electrolyte layer defining first and second faces and with said first face mounted on and in electrochemical contact with a first electrode and with said second face mounted on and in electrochemical contact with a second electrode, and an electrically conductive current collector joined to or mounted on or in said second electrode and in electrical contact with said second electrode, said electrically conductive current collector having an at least one extension extending outwards of a perimeter defined by said first and second electrodes and said electrolyte, fuel cell stack assemblies comprising same and methods of manufacture of same.

Description

technical field [0001] The present invention relates to improved current collectors for fuel cells, as well as fuel cells and fuel cell stack assemblies including the same. Background technique [0002] Fuel cells and fuel cell stack assemblies (a term that includes stacks having more than one fuel cell) are designed such that current can be efficiently collected from the anode and cathode of each fuel cell. A fuel cell stack assembly typically includes a plurality of fuel cells coupled in series, with the connection between adjacent fuel cells being established through a conductive medium (current collector) that connects the electrode (anode or cathode) of a first fuel cell to the adjacent An interconnection plate is connected, which in turn is electrically connected to the opposite electrode (ie, cathode or anode) of the second fuel cell. To ensure that current flows through the stack via the current collectors in a controlled manner without electrically shorting the fue...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02
CPCH01M8/249H01M8/0206H01M8/0228H01M8/0208H01M8/0232H01M8/0247H01M8/248Y02E60/50H01M8/0215H01M8/021H01M8/0273Y02E60/523Y02E60/525H01M8/0245H01M8/242H01M8/028H01M2008/1293H01M8/241Y10T29/49108Y02P70/50H01M8/2483H01M8/2432H01M4/88H01M8/02H01M8/04H01M8/24H01M8/0271
Inventor 艾哈迈德·塞卢卡尼尔·梅纳德马修·哈灵顿卡里姆·埃尔·库里安德鲁·贝克布鲁斯·格尔万
Owner CERES INTPROP CO LTD
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