Fuel cell and fuel cell stacks equipped with this

A fuel cell and fuel gas technology, which is used in fuel cell parts, fuel cells, fuel cell additives, etc., and can solve problems such as difficulty in maintaining power generation performance
CN1957494AInactive Publication Date: 2007-05-02PANASONIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC CORP
Publication Date
2007-05-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

Even when a reaction gas flows into a gap formed between a gasket and a membrane electrode assembly, the flowing of the reaction gas to the outside without flowing through an electrode is prevented and thus a decrease in power generation efficiency is prevented. In order to allow the water vapor contained in the reaction gas that flows into an anode-side gap 10a formed between an anode-side gasket 9a and a membrane electrode assembly 5 to condense in at least a part of the gap 10a, and to allow the condensed water to fill the gap 10a, the upstream portion of a cooling fluid channel 8a of an anode-side separator 6a is formed such that it includes a region corresponding to the gap 10a, and the upstream portion is formed such that it includes a region corresponding to a middle stream portion and subsequent portion of a fuel gas channel 7a.
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Description

technical field

[0001] The present invention relates to a fuel cell (in particular, to a polymer electrolyte fuel cell), and a fuel cell stack including the fuel cell. Background technique

[0002] A polymer electrolyte fuel cell is a battery that simultaneously generates electricity and heat by electrochemically reacting a fuel gas such as hydrogen and an oxidizing gas such as air with each other at gas diffusion electrodes serving as positive and negative electrodes. Fig. 22 shows a typical structure of such a polymer electrolyte fuel cell. As shown in FIG. 22, the fuel cell 100 includes at least one unit cell (cell) mainly composed of a membrane electrode assembly (MEA) 105 and a pair of separators sandwiching the membrane electrode assembly 105, that is, positive electrode side separators 106a. and the negative side separator 106b.

[0003] Membrane electrode assembly 105 has a structure in which polymer electrolyte membrane 101 that selectively transports cations (hyd...

Claims

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