JP2005228648A - Fuel cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel cell from which a gas that has a high dew point is outputted, and which is equipped with an inexpensive temperature and humidity exchanger superior in durability. <P>SOLUTION: By arranging a temperature and humidity exchange membrane between flow passages of two kinds of gas streams, a support body to support the temperature and humidity exchange membrane of the temperature and humidity exchanger is made of an olefinic resin or the like in which only carbon is contained in the main chain of the basic unit that is superior in the hydrolysis resistance wherein the hydrophilic elastomer is dispersed into the fuel cell equipped with the temperature and humidity exchanger that exchanges heat and water between the two kinds of gas streams. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fuel cell provided with a temperature / humidity exchanger in which a low-temperature dry gas is heated and humidified by moisture and heat transferred from a high-temperature wet gas through a moisture permeable membrane.

In the conventional temperature and humidity exchanger, a plurality of partition plates formed of plastic such as polypropylene resin are erected in parallel at a predetermined interval, and further have moisture permeability on the upper end surface side and the lower end surface side of each partition plate. The moisture permeable membrane is abutted and fixed (for example, refer to Patent Document 1).
Another temperature / humidity exchanger is composed of a partition plate in which a hygroscopic agent is applied to cellulose fibers together with a molding improver (see, for example, Patent Document 2).

JP-A-11-108409 Japanese Patent Laid-Open No. 7-208991

However, since the partition plate made of polypropylene resin has a hydrophobic surface, the surface on which the liquid film is coated in the gas flow path is limited to the moisture permeable film, and the dry gas flows from the flow path through which the wet gas flows. There is a problem that the efficiency of moisture transmission to the flow path through which the water flows is low and the dew point does not rise.
Moreover, when a cellulose fiber is used as a partition board, deterioration of mechanical strength will advance by a cellulose fiber being hydrolyzed. That is, the temperature and dew point of the wet gas discharged from the solid polymer electrolyte fuel cell are both about 70 ° C., and the cellulose fibers exposed to such a high temperature and high humidity atmosphere will be hydrolyzed. There's a problem.

  An object of the present invention is to provide a fuel cell that can output a gas having a high dew point and is equipped with an inexpensive temperature and humidity exchanger excellent in durability.

  The fuel cell according to the present invention includes a temperature / humidity exchanger in which a temperature / humidity exchange membrane is disposed between the flow paths of the two types of gas flows, and heat exchange and moisture exchange are performed between the two types of gas flows. In the fuel cell, the support that supports the temperature / humidity exchange membrane of the temperature / humidity exchanger is made of a resin in which a hydrophilic elastomer is dispersed.

  The effect of the fuel cell according to the present invention is that the support is made of a resin in which a hydrophilic elastomer is dispersed so that the liquid film is easily coated on the gas flow path surface. The area of the road surface is increased, and the water exchange efficiency can be improved. As a result, a high dew point gas can be supplied to the fuel cell, so that the output characteristics of the fuel cell are improved. Further, the resin is a carbon-only olefin-based or vinyl-based resin whose main unit main chain is excellent in hydrolysis resistance, or an ether-based or thioether-based resin containing only one atom other than carbon, and the others. Since it is made of resin, durability of the temperature / humidity exchanger under high temperature and high humidity is improved.

Embodiment 1 FIG.
1 is a perspective view of a temperature / humidity exchanger provided in a fuel cell according to Embodiment 1 of the present invention.
As shown in FIG. 1, the temperature / humidity exchanger of the first embodiment is formed of a rectangular parallelepiped, and the flow paths 1 and 2 through which two kinds of gases flow are configured to be orthogonal to each other. A temperature / humidity exchange membrane 3 is disposed between the flow paths 1 and 2. These two kinds of gases include air containing oxygen as an oxidant supplied to the fuel cell (hereinafter referred to as humidified gas) and air exhausted after the air contributes to the reaction in the fuel cell ( Hereinafter, it is referred to as wet gas. The humidified gas is heated and humidified by the heat and moisture transferred from the humid gas through the temperature / humidity exchange membrane 3 while flowing in the temperature / humidity exchanger, and supplied to the fuel cell. The wet gas is a high-temperature and high-humidity gas because it is heated and humidified by heat and water associated with the reaction between protons and oxygen that occur in the fuel cell.

The temperature / humidity exchange membrane 3 is supported by a plurality of supports 4 that are erected at predetermined intervals in the flow paths 1 and 2. The support 4 includes an outer support 5 facing the outer periphery and an inner support 6 that divides the flow paths 1 and 2 into a plurality of parts. The flow paths 1 and 2 are provided in a plurality of stages by alternately stacking a plurality of temperature / humidity exchange membranes 3 and supports 4. The odd-numbered flow paths 1 from the bottom are formed so that gas flows in parallel with one side in the horizontal direction of the rectangular parallelepiped, and the even-numbered flow paths from the bottom are the gas of the odd-numbered flow paths from the bottom. It is formed so as to be orthogonal to the flow. The humidified gas and the humidified gas are exchanged in the temperature and humidity by flowing through the odd-numbered flow paths 1 and the even-numbered flow paths 2, respectively.
The temperature / humidity exchange membrane 3 is 10 cm in length, 10 cm in width, and 50 μm in thickness. The outer support 5 is a resin plate having a width and height of 5 mm and a depth of 10 cm. The internal support 6 is a resin plate having a width of 3 mm, a height of 5 mm, and a depth of 10 cm.

  Further, the predetermined interval means an interval that can sufficiently suppress the swelling accompanying the change in humidity of the temperature / humidity exchange membrane 3 to be used and the deformation accompanying the change in temperature. Further, it is preferable that the number of the internal supports 6 provided in the flow paths 1 and 2 is as large as possible within a range in which the pressure loss and the material strength are not hindered. That is, as the surface area of the internal support 6 increases, the area of the liquid film increases and the amount of condensed water increases. Furthermore, since the cross-sectional area of the flow path surrounded by the temperature / humidity exchange membrane 3, the outer support 5 and the inner support 6 is reduced, the effective evaporation process is reduced and the amount of water evaporation is increased. The larger the number of the better.

  The temperature / humidity exchange membrane 3 used in the present invention is a cellulose sheet having a porous membrane thickness of 50 μm and a porosity of 20%. As the temperature / humidity exchange membrane 3, a polytetrafluoroethylene (PTFE) membrane having a thickness of 50 μm and a porosity of 50% can be used as a matter of course. Furthermore, the material is not particularly limited as long as it is formed from a material having a temperature / humidity exchange function, but as the material, for example, a material having high heat resistance is preferable, for example, polyphenylene sulfide, polyester, vinylon (registered trademark), polypropylene, Examples include acrylic resin, regenerated fiber, regenerated cellulose film, polyvinyl alcohol, polysulfone, polyimide, and polycarbonate.

The resin used for the support of the present invention is a polymer resin in which the main chain (matrix structure) of the basic unit of the resin is composed only of carbon. For example, an olefin resin such as polyethylene or polypropylene, a vinyl resin such as polystyrene or polybutadiene, and an acrylic resin such as an acrylic ester polymer or a methacrylic ester polymer. Moreover, these copolymers may be sufficient.
Furthermore, the resin used for the support of the present invention may be a polymer resin in which the main chain (matrix structure) of the basic unit of the resin contains one atom other than carbon and the others are composed of carbon. . Examples thereof include a polyether resin such as polypropylene oxide or polyphenylene ether having one ether bond in the main chain, and a polysulfide resin such as polyphenylene sulfide having one thioether bond in the main chain.

  In addition, resin can be represented by the basic unit as the minimum repeating unit which comprises polymer resin. This basic unit is composed of a main chain, which is an atomic sequence connected to an adjacent basic unit at both ends, and a side chain connected to the main chain. The main chain is made of carbon-carbon in, for example, polyethylene of olefin resin and polystyrene of vinyl resin. In addition, the polyphenylene oxide of the polyether resin is an ether type in which oxygen is not bonded to the benzene ring made of carbon and carbon bonded to oxygen by a double bond. In addition, the polyphenylene sulfide of the polysulfide resin consists only of a benzene ring and sulfur.

  Examples of the hydrophilic elastomer used in the support of the present invention include polyethylene glycol-based, polypropylene glycol-based, polyamide-based, and quaternary ammonium salt systems such as tetrapropylammonium hydroxide or benzyltrimethylammonium chloride. In addition, the hydrophilic elastomer as used in this invention is an elastomer which has the contact angle of water with respect to the solid surface of 30 degrees or less, for example.

In such a temperature / humidity exchanger, since the support 4 is made of a resin in which a hydrophilic elastomer is dispersed, the surface of the support 4 is hydrophilic. The state in the gas flow path when the hydrophilic support 4 is used will be described with reference to FIGS.
FIG. 2 is a schematic diagram showing the state of the liquid film 8 in the flow path constituted by the support 4 made of a resin in which a hydrophilic elastomer is dispersed. FIG. 3 is a schematic diagram showing the state of the liquid film 8 in the flow path constituted by the support 7 made only of the resin in which the hydrophilic elastomer is not dispersed. 2 and 3 are cross-sectional views when the flow paths 1 and 2 are cut obliquely in the AA cross section of FIG.
As shown in FIG. 2, since the surface of the support 4 made of a resin in which a hydrophilic elastomer is dispersed has hydrophilicity, moisture is condensed on the surface from the wet gas, and the liquid film 8 The surface is coated. Thus, since the liquid film 8 covers not only the temperature / humidity exchange membrane 3 but also the surface of the support 4, the amount of condensed water increases. By the way, the condensation of moisture occurs because the temperature of the temperature / humidity exchange membrane 3 and the support 4 is lower than the temperature of the wet gas. Therefore, when the thickness of the liquid film 8 increases, the thermal resistance related to the liquid film 8 increases. Less water condensation. However, since the surface of the support 4 is also covered with the liquid film 8, when a certain amount of water adheres as the liquid film 8 in the flow path, the thickness of the liquid film 8 increases as the area of the liquid film 8 increases. The moisture becomes thinner and the water condensation tends to proceed. On the other hand, as shown in FIG. 3, in the case of the support 7 made of a resin in which the hydrophilic elastomer is not dispersed, the surface of the support 7 does not have hydrophilicity, so the liquid film 8 is a temperature / humidity exchange membrane. Since only 3 is covered, the amount of moisture to be condensed is small, and the thickness of the liquid film 8 is increased, so that the thermal resistance is increased and the condensation of moisture hardly proceeds.

  Further, as shown in FIG. 2, since the surface of the support 4 made of a resin in which a hydrophilic elastomer is dispersed has hydrophilicity, the temperature and humidity are set in the flow path 1 through which the humidified gas flows. Since the water transferred through the exchange membrane 3 spreads as a liquid film 8 along the surfaces of the temperature / humidity exchange membrane 3 and the support 4, the effective evaporation process from the liquid film 8 is performed between the support 4 and the temperature / humidity exchange. It becomes equal to 1/4 of the hydraulic diameter of the flow path 1 surrounded by the membrane 3. That is, the evaporation rate of water is proportional to the gas-liquid contact area. On the other hand, as shown in FIG. 3, in the case of the support 7 made of a resin in which the hydrophilic elastomer is not dispersed, the surface of the support 7 has no hydrophilicity and is hydrophobic. The moisture transferred through the humidity exchange membrane 3 does not spread on the surface of the support 7 and only the temperature / humidity exchange membrane 3 is covered with the liquid membrane 8, so that the area where the gas contacts the liquid membrane 8 is reduced. ing. The effective evaporation process in this case is equal to 1/2 of the hydraulic diameter of the flow path surrounded by the support 4 and the temperature / humidity exchange membrane 3. Thus, the effective evaporation process can be halved by using the resin in which the hydrophilic elastomer is dispersed. The effective evaporation process means the distance when evaporating from the liquid film to the gas in the flow path. If only the temperature / humidity exchange membrane is wet, the distance is ½ of the hydraulic diameter on average. 1/4 if wet.

  Moreover, the temperature / humidity exchange rate is increased by alternately laminating the temperature / humidity exchange membrane 3 and the support 4 having a hydrophilic surface. In addition, since the internal support 6 is erected in the flow paths 1 and 2 at a predetermined interval, the temperature / humidity exchange membrane 3 is prevented from swelling and deforming and the liquid condensed on the surface of the temperature / humidity exchange membrane 3. The membrane 8 reaches the hydrophilic support 4 by surface tension. As a result, the gas-liquid contact area increases, and the evaporation rate increases proportionally.

Hereinafter, the first embodiment of the present invention will be further described with reference to examples. In this embodiment, the resin in which the hydrophilic elastomer used for the production of the support 4 is different, and the others are the same, so the description of the same parts is omitted.
Example 1.
In Example 1, the support 4 was made using a vinyl resin continuous antistatic ABS resin (Toyolac Parel (registered trademark) TP10, manufactured by Toray). The support 4 was produced by injection molding under the conditions of a resin temperature of 220 ° C. and a mold temperature of 40 ° C. using an injection molding machine. Moreover, the support body was produced only with ABS resin as a comparative example.

  Next, a droplet of pure water is dropped on the support 7 made of ABS resin in which the hydrophilic elastomer is not dispersed and the support 4 made of ABS resin in which the hydrophilic elastomer is dispersed. The contact angle between the surface and the droplet was measured and the hydrophilicity was compared. The liquid surface contact angle of the support 7 molded with the ABS resin in which the hydrophilic elastomer is not dispersed is 60 degrees, whereas the liquid surface of the support 4 molded with the ABS resin in which the hydrophilic elastomer is dispersed. The contact angle was 10 degrees, and the support 4 formed of a resin in which a hydrophilic elastomer was dispersed uniformly showed hydrophilicity.

  Next, the test piece molded from the ABS resin in which the hydrophilic elastomer was dispersed was immersed in a hot water immersion test apparatus for 5000 hours, and the tensile strength before and after immersion was measured. FIG. 4 shows the change in tensile strength with respect to the immersion time in the hot water immersion test. The result of Example 1 is shown by a solid line. Further, as indicated by the dotted line, a polycarbonate resin was similarly tested as a comparative example. As can be seen from the results of FIG. 4, since the mechanical strength hardly deteriorates even when immersed in warm water, it indicates that hydrolysis of the resin hardly occurs. On the other hand, when the polycarbonate resin exceeds 1000 hours, the tensile strength decreases.

  Next, a temperature / humidity exchanger for a fuel cell as shown in FIG. 1 was produced. As the temperature / humidity exchange membrane 3, a cellulose sheet having a length of 10 cm, a thickness of 50 μm, and a porosity of 20% was used. The outer support 5 has a width and a height of 5 mm and a depth of 10 cm. The internal support 6 has a width of 3 mm, a height of 5 mm, and a depth of 10 cm. In Example 1, a plurality of temperature / humidity exchange membranes 3 and supports 4 were alternately laminated (9 temperature / humidity exchange membranes 3 were used), and five channels 1 and 2 were provided. The odd-numbered flow paths 1 from the bottom are formed so that gas flows in parallel with one side in the horizontal direction of the rectangular parallelepiped, and the even-numbered flow paths from the bottom are the gas of the odd-numbered flow paths from the bottom. It is formed so as to be orthogonal to the flow. The humidified gas and the humidified gas were allowed to flow through the odd-numbered flow paths 1 and the even-numbered flow paths 2, respectively. The temperature / humidity exchanger of the comparative example was different in the material of the support 7 and the other was manufactured in the same manner.

  Using the temperature / humidity exchangers of Example 1 and Comparative Example manufactured as described above, wet gases having different dew points were supplied, and the ultimate dew point of the output humidified gas was measured. FIG. 5 shows a graph of the reached dew point of the humidified gas against the dew point of the wet gas. The ultimate dew point of the temperature / humidity exchanger of Example 1 is larger than the ultimate dew point of the temperature / humidity exchanger of the comparative example.

Further, the amount of moisture evaporated was measured from the amount of moisture contained in the output humidified gas by changing the gas flow rate of the humid gas supplied to the temperature and humidity exchangers of Example 1 and Comparative Example. FIG. 6 shows a graph of the evaporation amount of water against the gas flow rate of the supplied wet gas. The solid line shows the result of Example 1, and the dotted line shows the result of the comparative example. The amount of water evaporation in the temperature / humidity exchanger of the comparative example increases as the gas flow rate increases until the gas flow rate reaches 20 (liter / minute), but the gas flow rate increases to 20 (liter / minute). If it becomes above, even if it increases a gas flow rate, it will reach the saturation area | region where the evaporation amount of a water | moisture content does not increase. On the other hand, the amount of water evaporation in the temperature / humidity exchanger of Example 1 is generally larger than the amount of water evaporation of the temperature / humidity exchanger of the comparative example. Furthermore, when the gas flow rate is increased to 20 (liters / minute) or more, the amount of water evaporation increases with the increase, and the gas flow rate does not saturate until 35 (liters / minute).
Thus, the temperature and humidity exchanger using a hydrophilic support has a larger amount of moisture evaporation than the comparative example, and even when the gas flow rate is increased, the amount of moisture evaporation is not saturated. It can be performed.

Example 2
In Example 2, an antistatic resin (Bayon (registered trademark) YM312 manufactured by Kureha Chemical Co., Ltd.) in which a polyethylene glycol-based elastomer is dispersed in an acrylic resin is used as the resin in which the hydrophilic elastomer used for the production of the support 4 is dispersed. Using. The support 4 was produced by injection molding under the conditions of a resin temperature of 240 ° C. and a mold temperature of 40 ° C. using an injection molding machine. A temperature / humidity exchanger similar to that in Example 1 was prepared and the dew point of the humidified gas was measured, and the dew point was comparable. Moreover, even if the test piece was immersed in warm water, the change of tensile strength was not seen similarly to Example 1. Thus, even if the support 4 is produced from a resin in which a polyethylene glycol elastomer is dispersed in an acrylic resin, it has excellent durability and hydrophilicity.

Example 3
In Example 3, as the resin in which the hydrophilic elastomer used for the production of the support 4 is dispersed, polypropylene resin pellets (Grand Polypro (registered trademark) J105W, manufactured by Grand Polymer), which is an olefin resin material, are coated with polyethylene glycol-based heat. A plastic elastomer (Pelestat (registered trademark) 300, manufactured by Sanyo Kasei Kogyo Co., Ltd.) was 20 wt% dry blended and injection molded under the conditions of a resin temperature of 220 ° C. and a mold temperature of 40 ° C. to prepare a support. A temperature / humidity exchanger similar to that in Example 1 was prepared and the dew point of the humidified gas was measured, and the dew point was comparable. Moreover, even if the test piece was immersed in warm water, the change of tensile strength was not seen similarly to Example 1. Thus, even if the support body 4 is produced from a resin in which a polyethylene glycol-based thermoplastic elastomer is dispersed in a polypropylene resin, it has excellent durability and hydrophilicity.

Example 4
In Example 4, as the resin in which the hydrophilic elastomer used for the production of the support 4 is dispersed, polystyrene resin pellets (Toyostyrene (registered trademark) H400, manufactured by Toyo Styrene), which is a vinyl resin material, are coated with polyethylene glycol heat A plastic elastomer (Pelestat (registered trademark) 6321, manufactured by Sanyo Kasei Kogyo Co., Ltd.) was 20 wt% dry blended and injection molded under the conditions of a resin temperature of 240 ° C. and a mold temperature of 40 ° C. to prepare a support. A temperature / humidity exchanger similar to that in Example 1 was prepared and the dew point of the humidified gas was measured, and the dew point was comparable. Moreover, even if the test piece was immersed in warm water, the change of tensile strength was not seen similarly to Example 1. Thus, even if the support body 4 is produced from a resin in which a polyethylene glycol-based elastomer is dispersed in a polystyrene resin, it has excellent durability and hydrophilicity.

Embodiment 5 FIG.
In Example 5, as the resin in which the hydrophilic elastomer used for the production of the support 4 is dispersed, syndiotactic polystyrene resin pellets (Zarek (registered trademark) S100, manufactured by Idemitsu Petrochemical Co., Ltd.), which is a vinyl resin material, are used as polyethylene. A glycol-based thermoplastic elastomer (Pelestat 6321, manufactured by Sanyo Chemical Industries) was dry blended at 20 wt%, and injection molded under conditions of a resin temperature of 290 ° C. and a mold temperature of 40 ° C. to prepare a support. A temperature / humidity exchanger similar to that in Example 1 was prepared and the dew point of the humidified gas was measured, and the dew point was comparable. Moreover, even if the test piece was immersed in warm water, the change of tensile strength was not seen similarly to Example 1.

Example 6
In Example 6, as the resin in which the hydrophilic elastomer used for the production of the support 4 is dispersed, a modified polyphenylene ether resin pellet (Iupiace (registered trademark) AV40, manufactured by Mitsubishi Engineering Plastics), which is an ether resin material, is added to polyethylene glycol. A thermoplastic elastomer (Pelestat 6321, manufactured by Sanyo Chemical Industries) was 20 wt% dry blended and injection molded under conditions of a resin temperature of 260 ° C and a mold temperature of 70 ° C to prepare a support. A temperature / humidity exchanger similar to that in Example 1 was prepared and the dew point of the humidified gas was measured, and the dew point was comparable. Moreover, even if the test piece was immersed in warm water, the change of tensile strength was not seen similarly to Example 1.

  Thus, even if a hydrophilic elastomer is dispersed in the polyphenylene ether resin, a highly efficient temperature and humidity exchanger excellent in durability can be obtained. It should be noted that the same effect can be obtained even when the support 4 is produced using a polyphenylene sulfide resin instead of the polyphenylene ether resin pellet of Example 6.

  Such a temperature / humidity exchanger does not show deterioration of mechanical strength even in a high-temperature and high-humidity atmosphere, and can transfer moisture from a humid gas to a humidified gas with high efficiency. Can be supplied to the fuel cell.

  Moreover, the surface of the support body 4 shows hydrophilicity by producing the support body 4 by dispersing a hydrophilic elastomer in a resin. Further, the hydrophilic effect lasts for a long time without peeling or dropping off when the hydrophilic material is coated on the surface of the resin.

  Moreover, since these resins can be molded by an injection molding method, it is possible to obtain an inexpensive support 4 that is excellent in productivity.

Embodiment 2. FIG.
FIG. 7 is an enlarged cross-sectional view of a temperature / humidity exchanger support provided in a fuel cell according to Embodiment 2 of the present invention. FIG. 8 shows the amount of moisture evaporation obtained from the moisture contained in the humidified gas with respect to the gas flow rate of the wet gas supplied in the temperature and humidity exchanger of the second embodiment. The temperature / humidity exchanger according to the second embodiment is the same as the temperature / humidity exchanger according to the first embodiment except that the support 11 is different from the first embodiment.
As shown in FIG. 7, the support 11 is provided with grooves 12 having a width of 0.2 mm and a depth of 0.2 mm on the side surface at a pitch of 0.4 mm. This support 11 is produced by an injection molding method as in the first embodiment. The injection mold used at this time is provided with grooves having a width of 0.2 mm and a depth of 0.2 mm with a pitch of 0.4 mm at locations corresponding to the side surfaces. Further, the mold is configured to be divided along the side surface of the support 11.
Next, as shown in FIG. 8, the amount of water evaporation of the second embodiment indicated by the one-dot broken line is larger than that of the comparative example over the entire gas flow rate as in the first embodiment. Furthermore, in Example 1, the gas flow rate is 35 (liters / minute) or more, and the evaporation amount of water tends to be saturated. However, in the temperature and humidity exchanger according to the second embodiment, 35 (liters / minute) or more. Also shows no tendency to be saturated.

In such a temperature / humidity exchanger, since the surface of the support is provided with fine irregularities, the surface area of the support 11 is increased, and both the amount of water condensed and the amount of water evaporated are increased. Shows the exchange efficiency.
A draft may be provided so that the molded product can be taken out more easily.

It is a perspective view of the temperature / humidity exchanger concerning Embodiment 1 of this invention. It is a figure which shows the mode of the liquid film in the flow path using the support body produced from the resin in which the hydrophilic elastomer was disperse | distributed. It is a figure which shows the mode of the liquid film in the flow path using the support body produced from resin in which a hydrophilic elastomer is not disperse | distributed. It is a figure which shows the warm water immersion test result of the support body of Example 1. It is a figure which shows the relationship between the dew point of the humid gas in the temperature / humidity exchanger of Example 1 and a comparative example, and the ultimate dew point of humidified gas. It is a figure which shows the relationship between the gas flow rate in the temperature-humidity exchanger of Example 1 and a comparative example, and the evaporation amount of a water | moisture content. It is a fragmentary sectional view of the support body concerning Embodiment 2 of this invention. It is a figure which shows the relationship between the gas flow rate in the temperature / humidity exchanger of Embodiment 2, and the evaporation amount of a water | moisture content.

Explanation of symbols

  1, 2, flow path, 3 temperature / humidity exchange membrane, 4, 7, 11 support body, 5 outer support body, 6 internal support body, 8 liquid film, 12 groove.

Claims (6)

In a fuel cell provided with a temperature / humidity exchanger that performs heat exchange and moisture exchange between the two gas flows by disposing a temperature / humidity exchange membrane between the flow paths of the two gas flows,
The fuel cell according to claim 1, wherein the support for supporting the temperature / humidity exchange membrane of the temperature / humidity exchanger is made of a resin in which a hydrophilic elastomer is dispersed.   2. The fuel cell according to claim 1, wherein the resin is a polymer including only carbon in a main chain of a basic unit.   2. The fuel cell according to claim 1, wherein the resin is a polymer having an ether type molecular structure in which a main chain of the basic unit includes one atom other than carbon.   4. The hydrophilic elastomer according to any one of claims 1 to 3, wherein the hydrophilic elastomer is at least one elastomer of a polyethylene glycol type, a polypropylene glycol type, a polyamide type, or a quaternary ammonium salt type. Fuel cell.   The fuel cell according to any one of claims 1 to 4, wherein the support is molded by a resin injection molding method.   The fuel cell according to claim 5, wherein a groove is provided on a surface of the support.

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