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Electrolyte film structure for fuel cell, MEA structure and fuel cell

A fuel cell and electrolyte membrane technology, applied in fuel cells, fuel cell groups, fuel cell components, etc., can solve problems such as polymer electrolyte membrane damage, potential drop, battery damage, etc.

Inactive Publication Date: 2010-12-15
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, in all cells, the potential drops significantly, and the gas originally consumed by the battery reaction burns with the oxidant gas on the air electrode side under the action of the catalyst, causing damage to the polymer electrolyte membrane.
As a result, it is ultimately the most damaging cells with electrolyte membranes where the gasses of the two poles pass through the membrane and mix together so that a serious situation of cell destruction can occur

Method used

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  • Electrolyte film structure for fuel cell, MEA structure and fuel cell
  • Electrolyte film structure for fuel cell, MEA structure and fuel cell
  • Electrolyte film structure for fuel cell, MEA structure and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Figure 11 It is a plan view of the structure of the anode-side surface of the frame included in the polymer electrolyte fuel cell of Example 1 of the present invention. and Figure 12 is a plan view of the structure of the cathode-side surface of the frame.

[0101] Such as Figure 11 with Figure 12 As shown, a rectangular opening 26 is provided in the center of the frame body 20 . The rectangular MEA 25 larger than the opening 26 by a predetermined value is sandwiched by the frame 20 as described below. In addition, an air splitter 21 , a hydrogen splitter 22 , a water splitter 23 , and bolt holes 24 are appropriately formed in the peripheral portion of the frame body 20 .

[0102] This frame body 20 is to use Thomson mold to be punched into the polymer electrolyte membrane (Naphion117 of DuPont Company, 50 micron thickness) of the shape of 140mm square as embedded member, utilize 180 tons of high-speed injection molding machine to form external dimension and be...

Embodiment 2

[0133] Figure 20 It is a partial sectional view of the structure near the water separator of the polymer electrolyte fuel cell according to Example 2 of the present invention. Figure 21 It is a partial sectional view of the structure near the air splitter of the polymer electrolyte fuel cell according to Example 2 of the present invention. Figure 20 with Figure 21 Respectively for Embodiment 1 Figure 17 with Figure 18 Sectional views of components of the same parts as shown in the case. again Figure 20 in, with Figure 17 Similarly, for the convenience of description, the description of the cooling water channel and the sealing structure of the cooling water surface provided on the anode isolation layer 30 and the cathode isolation layer 36 is omitted.

[0134] Such as Figure 20 with Figure 21 As shown, the frame body 20 sandwiching the peripheral portion of the polymer electrolyte membrane 63 is sandwiched by an anode separator 30 and a cathode separator 36 m...

Embodiment 3

[0145] Figure 36 It is a plan view of the main structure of the cathode separator press-bonded to the cathode-side surface of the frame included in the polymer electrolyte fuel cell according to Example 3 of the present invention. Figure 37 is the same as that of Embodiment 1 Figure 17 A partial cross-sectional view of the structure of the same part as shown in the case. Should Figure 37 is equivalent to Figure 36 Sectional view of the assembly at the site of the Z-Z line. Also, in Figure 37 neutralize Figure 17 Similarly, for the convenience of description, the cooling water channel and the sealing structure of the cooling water surface provided on the anode isolation layer 30 and the cathode isolation layer 36 are omitted.

[0146] In Example 3, using as Figure 36 The shown sealed wire groove is formed with a plurality of stopper grooves 111, and is a thermally press-molded isolation layer (prototype product of Nisshinbo Co., Ltd.) mainly composed of carbon po...

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Abstract

The present invention relates to a sealing structure for a fuel cell, including sealing structures of sub-portions of a fuel cell, which may be pre-fabricated and stacks composed of a plurality of fuel cells to reliably and easily seal between separators as well as between a separator and polymer electrolyte membranes, a fuel cell electrolyte membrane-electrode assembly structure, and a fuel cell.A configuration of an electrolyte membrane for a fuel cell is provided, which can be sealed reliably and easily between the separators. The sealing configuration is between the separators and betweena peripheral portion of the electrolyte membrane and the respective separators. The sealing configuration includes a frame having an elastic modulus of greater than about 2,000 MPa and less than about 2,000,000 MPa and an elastic body having an elastic modulus of greater than 0 MPa and less than about 200 MPa. In one embodiment, the separators or portions thereof may themselves constitute the at least one elastic body. In another embodiment, the electrolyte membrane may be held by two frames lying on opposite sides of the electrolyte membrane, with the at least one elastic body arranged between the first and second frames sandwiching the membrane and also between the frames and the respective separators.

Description

technical field [0001] In particular, the present invention relates to a structure of an electrolyte membrane for a fuel cell, a structure of an electrolyte membrane-electrode assembly for a fuel cell, and a structure comprising the electrolyte membrane-electrode assembly for a fuel cell, in which the sealing structure arranged at the peripheral portion of the electrolyte membrane for a fuel cell is improved. solid fuel cell. Background technique [0002] The basic principle of the polymer electrolyte fuel cell is that one side of the ion-exchange membrane used as the fuel cell electrolyte membrane is exposed to fuel gas, and the other side is exposed to oxidant gas such as air, and a chemical reaction occurs through the ion-exchange membrane to synthesize Water, with which the reaction energy takes place electrically. [0003] The basic power generation element of such a fuel cell consists of a polymer electrolyte membrane that selectively transports hydrogen ions, and a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/02H01M2/08H01M8/00H01M8/10H01M8/24
CPCY02E60/50H01M8/242H01M8/0273H01M8/0276H01M8/2483H01M8/241H01M8/0263
Inventor 小林晋松本敏宏富泽猛粉川胜藏神原辉寿
Owner PANASONIC CORP