JP4550784B2 - Manufacturing method of electrolyte structure - Google Patents

Manufacturing method of electrolyte structure Download PDF

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JP4550784B2
JP4550784B2 JP2006217193A JP2006217193A JP4550784B2 JP 4550784 B2 JP4550784 B2 JP 4550784B2 JP 2006217193 A JP2006217193 A JP 2006217193A JP 2006217193 A JP2006217193 A JP 2006217193A JP 4550784 B2 JP4550784 B2 JP 4550784B2
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electrolyte membrane
substrate
base material
film
catalyst
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JP2007123239A (en
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修 角谷
淳一 中野
智秀 渋谷
洋平 小林
玄 沖山
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Honda Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Description

本発明は、基材の表面に電解質膜を形成してなる膜付基材に触媒材を塗布して電解質構造体を得ることを特徴とする電解質構造体の製造方法の改良に関する。   The present invention relates to an improvement in a method for producing an electrolyte structure, which is characterized in that an electrolyte structure is obtained by applying a catalyst material to a film-coated substrate formed by forming an electrolyte membrane on the surface of the substrate.

近年、電解質構造体を備える燃料電池（固体高分子形燃料電池とも云う。）は、低温で作動し出力密度が高く小型化が可能であるという特徴を有することから、車載用電源などへの応用が期待され、その研究開発が盛んに行われている。   In recent years, a fuel cell (also referred to as a polymer electrolyte fuel cell) including an electrolyte structure has characteristics that it operates at a low temperature, has a high output density, and can be miniaturized. Therefore, the research and development is actively conducted.

燃料電池の電解質構造体は、基材の表面に電解質膜及び触媒材を形成してなる積層体であり、この電解質構造体を均質、安価で且つ大量に製造する技術を確立することが重要な課題となっている。   An electrolyte structure of a fuel cell is a laminate formed by forming an electrolyte membrane and a catalyst material on the surface of a base material, and it is important to establish a technique for manufacturing the electrolyte structure in a homogeneous, inexpensive and large quantity. It has become a challenge.

従来、基材の表面に電解質膜を塗布してなる膜付基材を得る。そして、この膜付基材を乾燥して乾燥体を得る製造方法が提案されている（例えば、特許文献１参照。）。
特開２００４−３５６０７５公報（図１） Conventionally, a film-coated substrate is obtained by applying an electrolyte membrane to the surface of a substrate. And the manufacturing method which dries this base material with a film | membrane and obtains a dry body is proposed (for example, refer patent document 1).
JP 2004-356075 A (FIG. 1)

特許文献１を次図に基づいて説明する。
図９は従来の技術の基本構成を説明する図であり、電解質構造体の製造装置１００は、基材１０１を巻き出す基材巻き出し装置１０２と、基材１０１に電解質膜の溶液１０３を塗布して膜付基材１０４を得る塗布装置１０５と、支持材１０６を巻き出す支持材巻き出し装置１０７と、基材１０１に塗布された電解質膜１０８に、支持材１０６を重ね合わせて膜付部材１０４を含む積層体１０９を得る積層ロール１１０及び、積層体１０９を乾燥する乾燥器１１１・・・（・・・は複数を示す。以下同じ。）と、乾燥した積層体１０９を巻き取る巻取り装置１１２を備えた装置である。そして、基材巻き出し装置１０２及び支持材巻き出し装置１０７のボビン１１４、１１５の回転トルクを調整し、基材１０１及び支持材１０６に所定の張力を付与することで、積層体１０９において、しわのない膜付基材１０４を得るというものである。 Patent document 1 is demonstrated based on the following figure.
FIG. 9 is a diagram for explaining a basic configuration of a conventional technique. An electrolyte structure manufacturing apparatus 100 includes a base material unwinding apparatus 102 that unwinds a base material 101, and an electrolyte membrane solution 103 applied to the base material 101. Then, the coating device 105 for obtaining the film-coated substrate 104, the support material unwinding device 107 for unwinding the support material 106, and the electrolyte membrane 108 applied to the substrate 101 are overlapped with the support material 106 to form a film-coated member. 104, a laminating roll 110 for obtaining a laminated body 109 including 104, a dryer 111 for drying the laminated body 109 (... indicates a plurality, the same applies hereinafter), and a winding for winding the dried laminated body 109. The device includes the device 112. Then, by adjusting the rotational torque of the bobbins 114 and 115 of the base material unwinding device 102 and the support material unwinding device 107 and applying a predetermined tension to the base material 101 and the support material 106, This is to obtain a film-coated substrate 104 having no film.

しかし、基材１０１に電解質膜１０８を形成した後、膜付部材１０４をすぐに巻き取ると、電解質膜１０８がまだ柔らかいために、電解質膜１０８が崩れてしまう。   However, if the membrane-coated member 104 is immediately wound after the electrolyte membrane 108 is formed on the substrate 101, the electrolyte membrane 108 will collapse because the electrolyte membrane 108 is still soft.

電解質膜１０８の強度を高めるために、巻き取る前に電解質膜１０８を乾燥器１１１・・・で急激に乾燥させると、電解質膜１０８は脱湿され、電解質膜１０８に収縮が起きる。   In order to increase the strength of the electrolyte membrane 108, if the electrolyte membrane 108 is rapidly dried with a dryer 111... Before being wound, the electrolyte membrane 108 is dehumidified and the electrolyte membrane 108 contracts.

電解質膜１０８は吸湿性及び撥水性に富んでいる材料であり、湿分を大量に吸湿した電解質膜１０８を脱湿すると、収縮する量は大きい。このように、電解質膜１０８の膨張又は収縮により、基材１０１上に一体化した電解質膜１０８が剥離したり、電解質膜１０８にしわが発生するという問題が残る。
基材１０１上の電解質膜１０８に剥離やしわが発生しない製造方法を確立することが望まれる。 The electrolyte membrane 108 is a material rich in hygroscopicity and water repellency, and when the electrolyte membrane 108 that has absorbed a large amount of moisture is dehumidified, the amount of shrinkage is large. As described above, there remains a problem that the electrolyte membrane 108 integrated on the substrate 101 is peeled off or wrinkles are generated in the electrolyte membrane 108 due to the expansion or contraction of the electrolyte membrane 108.
It is desired to establish a manufacturing method in which peeling or wrinkle does not occur in the electrolyte membrane 108 on the substrate 101.

そこで、本発明は、電解質膜の基材からの剥離や基材上の電解質膜のしわを防止する電解質構造体を製造する技術を提供することを課題とする。   Then, this invention makes it a subject to provide the technique which manufactures the electrolyte structure which prevents peeling from the base material of an electrolyte membrane, or the wrinkle of the electrolyte membrane on a base material.

請求項１に係る発明は、所定の湿度に調整した雰囲気中で、基材の表面に電解質膜を形成し膜付基材を得る膜形成工程と、得られた膜付基材を所定の湿度と同等の湿度に調整した雰囲気中で加湿する第１加湿工程と、加湿された膜付基材に触媒材を塗布して触媒付基材を得る塗布工程と、得られた触媒付基材を所定の湿度と同等の湿度に調整した雰囲気中で加湿する第２加湿工程と、加湿された触媒付基材を乾燥して乾燥体を得る乾燥工程と、
からなることを特徴とする。 The invention according to claim 1 is a film formation step of forming an electrolyte membrane on the surface of a substrate to obtain a substrate with a film in an atmosphere adjusted to a predetermined humidity, and the obtained substrate with a film is subjected to a predetermined humidity. A first humidifying step of humidifying in an atmosphere adjusted to a humidity equivalent to the above, a coating step of applying a catalyst material to the humidified substrate with a film to obtain a substrate with catalyst, and the obtained substrate with catalyst A second humidification step of humidifying in an atmosphere adjusted to a humidity equivalent to a predetermined humidity, a drying step of drying the humidified base material with catalyst and obtaining a dried body ,
Or characterized in that the Ranaru.

請求項１に係る発明では、所定の湿度に調整した雰囲気中で加湿し、膜付基材に触媒材を塗布して触媒付基材を形成し、その後、得られた触媒付基材を所定の湿度と同等の湿度に調整した雰囲気中で加湿し、この触媒付基材を乾燥して乾燥体を形成するようにした。 In the invention according to claim 1 , humidification is performed in an atmosphere adjusted to a predetermined humidity, a catalyst material is applied to the film-coated substrate to form the catalyst-coated substrate, and then the obtained catalyst-coated substrate is Humidification was performed in an atmosphere adjusted to a humidity equivalent to the above humidity, and the substrate with catalyst was dried to form a dried body .

吸水性及び撥水性に富む電解質膜に膜付基材を得るときの雰囲気と同等の湿度調整した雰囲気中で加湿する加湿工程において、適度な湿分を付加することにより、電解質膜の過度な収縮を防止することができる。電解質膜が過度に収縮することを防止することで、基材から電解質膜が剥離するという問題を防止することができる。
この結果、基材上の電解質膜が剥離し難い電解質構造体を製造することができるという利点がある。 Excessive shrinkage of the electrolyte membrane by adding moderate moisture in the humidification process of humidifying in an atmosphere adjusted to the same humidity as the atmosphere for obtaining a membrane-coated substrate on an electrolyte membrane rich in water absorption and water repellency Can be prevented. By preventing the electrolyte membrane from shrinking excessively, it is possible to prevent the problem that the electrolyte membrane peels from the base material.
As a result, there is an advantage that an electrolyte structure in which the electrolyte membrane on the substrate is difficult to peel can be manufactured.

本発明を実施するための最良の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。 The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals .

図１は本発明で用いる膜付基材を説明する図であり、基材２１の表面２１ａに電解質膜２２・・・を形成してなる膜付基材２３を得る。
所定の湿度に調整した雰囲気中で、基材２１の表面２１ａに電解質膜２２を形成し膜付基材２３を得る。所定の温度は、４０％〜６０％、好ましくは５０％である。膜付基材２３は、ロール部材２４の形で供給され、このロール部材２４を巻き出すことにより得られる。 FIG. 1 is a diagram for explaining a film-coated substrate used in the present invention , and a film-coated substrate 23 formed by forming electrolyte membranes 22... On the surface 21 a of the substrate 21 is obtained.
In an atmosphere adjusted to a Jo Tokoro humidity, obtaining Makuzuke substrate 23 to form an electrolyte membrane 22 on the surface 21a of the substrate 21. The predetermined temperature is 40% to 60%, preferably 50%. The film-coated substrate 23 is supplied in the form of a roll member 24 and is obtained by unwinding the roll member 24.

基材２１の表面に形成した電解質膜２２は、ロール部材２４の巻き出し方向に、断続的に配置されている。また、電解質膜２２の幅方向の長さは、基材２１の幅よりも小さい。
ここで、基材２１とは、多孔質の材料で、電解質を含浸させるためのもと材となるものであり、電解質膜２２を補強する部材である。 The electrolyte membrane 22 formed on the surface of the substrate 21 is intermittently disposed in the unwinding direction of the roll member 24. Further, the length in the width direction of the electrolyte membrane 22 is smaller than the width of the base material 21.
Here, the base material 21 is a porous material, which is a base material for impregnating the electrolyte, and is a member that reinforces the electrolyte membrane 22.

図２は図１の２−２線断面図であり、膜付部材の構造を説明する図である。
巻き出した膜付基材２３は、幅方向水平に延ばした基材２１と、この基材２１の表面２１ａに密着させた電解質膜２２と、からなる２層構造の部材である。 2 2 of FIG. 1 - is a two-wire cross-sectional view diagrams for explaining the structure of Makuzuke member.
The unwound substrate 23 with a film is a member having a two-layer structure including a substrate 21 extending horizontally in the width direction and an electrolyte membrane 22 in close contact with the surface 21 a of the substrate 21.

図３は本発明に係る触媒付基材の断面図であり、触媒付基材２６の構造を説明する図である。
電解質膜２２の表面２２ａに触媒材２５を塗布すると、膜付基材２３は触媒付基材２６となる。 Figure 3 is a cross-sectional view of the engagement Ru catalysts substrate with the present invention, is a diagram illustrating the structure of the catalyst substrate with 26.
When applying the catalyst material 25 to the surface 22a of the electrolyte membranes 22, the film substrate with 23 as a catalyst substrate with 26.

触媒付基材２６は、基材２１と、基材２１の表面２１ａに配置した電解質膜２２と、電解質膜２２の表面２２ａに配置した触媒材２５と、からなる３層構造の部材である。
すなわち、塗布工程において、膜付基材２３に触媒材２５を塗布して触媒付基材２６を得る。 The base material with catalyst 26 is a member having a three-layer structure including the base material 21, the electrolyte membrane 22 disposed on the surface 21 a of the base material 21, and the catalyst material 25 disposed on the surface 22 a of the electrolyte membrane 22.
That is, in the coating step, the catalyst material 25 is applied to the film-coated substrate 23 to obtain the catalyst-coated substrate 26.

図４は本発明で用いる乾燥室を説明する図である。
乾燥室３１内に乾燥空気を吹き出すヒータユニット３２を３つ設ける。そして、乾燥室３１内に図矢印３３の方向に触媒付基材２６を移動させ、この触媒付基材２６の基材２１側に向けヒータユニット３２・・・から熱した空気を当て、触媒付基材２６を乾燥させ乾燥体３４を得る。なお、３５・・・は触媒付基材２６を回動自在に支持するローラである。
すなわち、触媒付基材２６を乾燥して乾燥体３４を得る。 Figure 4 is a view for explaining the drying chamber used in the present invention.
The heater unit 32 for blowing dry air into dry燥室31 3 provided. And the base material 26 with a catalyst is moved in the direction of the arrow 33 in the drying chamber 31, and the air heated from the heater units 32... The base material 26 is dried to obtain a dried body 34. In addition, 35 ... is a roller which supports the base material 26 with a catalyst so that rotation is possible.
In other words, to obtain a dried body 34 by drying the medium substrate with 26 touch.

なお、本実施例において、ヒータユニット３２の数は３つとし、断続的に熱した空気を当てるが、これに限定されず、ヒータユニットの数、ヒータユニットの能力などは任意に設定可能なものとする。 In the present embodiment, the number of the heater unit 32 is shed 3 Tsutoshi, Intermittent to hot air, but not limited to, the number of the heater unit, and the ability of the heater unit is a arbitrarily set Shall.

図５は本発明で用いる加湿室を説明する図である。
加湿室４１内に加湿空気を吹き出す加湿ユニット４２を３つ設ける。そして、加湿室４１内に図矢印４３の方向に触媒付基材２６を乾燥させた乾燥体３４を移動させ、触媒材２５を塗布する側に向け加湿ユニット４２・・・から加湿した空気を当て、膜形成工程における所定の湿度と同等の湿度に調整した雰囲気中で加湿する。なお、４５・・・は支持部材としてのローラである。
加湿工程における雰囲気の設定は、膜形成工程での湿度（４０％〜６０％、好ましくは５０％）と同一とするが、±５％の差は許容できる。 Figure 5 is a diagram illustrating a humidification chamber for use in the present invention.
The humidifying unit 42 for blowing humidified air into the pressurized moist chamber 41. Three provided. Then, in the direction of arrows 43 into the humidifying chamber 41 the catalyst-substrate 26 by moving the dried body 34 is dried, the humidified from the humidifying unit 42 ... toward the side of applying the tactile Baizai 25 air hit and humidification in an atmosphere adjusted to a predetermined humidity and equivalent moisture in the membrane formation process. In addition, 45 ... is a roller as a supporting member .
Setting atmosphere in humidification process, the humidity in the film formation process (40% to 60%, preferably 50%) is the same as the difference of ± 5% is acceptable.

本実施例において、加湿ユニット４２の数は３つとし、断続的に加湿した空気を当てるものであるが、加湿ユニットの数、加湿ユニットの能力などは任意に設定可能なものとする。   In the present embodiment, the number of humidifying units 42 is three and intermittently humidified air is applied, but the number of humidifying units, the capacity of the humidifying units, and the like can be arbitrarily set.

以下に、図１〜図５を参照して本発明の作用を説明する。
基材２１と電解質膜２２とからなる膜付基材２３に、触媒材２５を塗布して触媒付基材２６を得、この触媒付基材２６を乾燥し乾燥体３４を得、この乾燥体３４を加湿して乾燥体３４に備える電解質膜２２に湿分を付加する。 Hereinafter, the operation of the present invention with reference to FIGS.
The catalyst material 25 is applied to the film-coated substrate 23 composed of the substrate 21 and the electrolyte membrane 22 to obtain the catalyst-coated substrate 26, and the catalyst-coated substrate 26 is dried to obtain a dried body 34. 34 humidified by the addition of moisture to the electrolyte membrane 22 provided in the drying body 34.

従来、触媒材を塗布する工程において、電解質膜を得る膜形成工程と湿度が異なっているときには、電解質２２（例えば、芳香族炭化水素系電解質。）と基材２１（例えば、ポリエチレンテレフタレート（ＰＥＴ）。）は、収縮率が異なるので、ロール加工により折り返しなどを行うと、基材２１から電解質膜２２が剥離したり、基材２１上の電解質膜２２にしわが発生する虞があった。 Conventionally, in the step of applying the catalyst material, when the humidity is different from the film forming step for obtaining the electrolyte membrane, the electrolyte 22 (for example, aromatic hydrocarbon-based electrolyte) and the substrate 21 (for example, polyethylene terephthalate (PET)). .) since shrinkage ratio differs, performing like folded by rolling, or the electrolyte membrane 22 is peeled off from the base material 21, wrinkles in the electrolyte membrane 22 on the substrate 21 there is a possibility to occur.

この点、本発明では、基材２１と電解質膜２２間の密着性を維持するため、基材２１に電解質膜２２を塗布して膜付基材２３を得る膜形成工程と同等の湿度（５０％）に調整した雰囲気中で加湿する加湿工程を設けたので、電解質膜２２の剥離やしわが防止でき、膜付基材の連続加工やローラによって折り返して加工する場合において、剥離やしわを抑え、工程の品質を安定させることができる。   In this respect, in the present invention, in order to maintain the adhesion between the base material 21 and the electrolyte membrane 22, the humidity (50) equivalent to the film forming step of applying the electrolyte membrane 22 to the base material 21 to obtain the base material with film 23 (50). %)), It is possible to prevent peeling and wrinkling of the electrolyte membrane 22, and to suppress peeling and wrinkling in continuous processing of a film-coated substrate or processing by folding with a roller. , Process quality can be stabilized.

すなわち、吸水性及び撥水性に富む電解質膜２２に適度な湿分を付加することにより、電解質膜２２の過度な収縮を抑制することができる。電解質膜２２が過度に収縮することは無くなるため、基材２１と、この基材２１の上に形成した電解質膜２２との間に大きな応力は発生せず、基材２１から電解質膜２２が剥離するなどの問題を抑制することができる。   That is, excessive shrinkage of the electrolyte membrane 22 can be suppressed by adding appropriate moisture to the electrolyte membrane 22 rich in water absorption and water repellency. Since the electrolyte membrane 22 does not shrink excessively, a large stress is not generated between the base material 21 and the electrolyte membrane 22 formed on the base material 21, and the electrolyte membrane 22 peels from the base material 21. It is possible to suppress problems such as

この結果、基材２１上の電解質膜２２が剥離し難い電解質構造体を製造することができる。基材２１上の電解質膜２２が剥離するなどの問題は発生しないため、高品質な電解質構造体を製造することができる。   As a result, an electrolyte structure in which the electrolyte membrane 22 on the substrate 21 is difficult to peel can be manufactured. Since the problem that the electrolyte membrane 22 on the base material 21 peels does not occur, a high quality electrolyte structure can be manufactured.

なお、電解質膜は、芳香族炭化水素系電解質であるが、この他、パーフルオロスルホン酸系電解質（ナフィオン：登録商標 デュポン社製、フレミオン：登録商標 旭硝子（株）製、アシプレックス 旭化成工業（株））等であっても剥離等の問題は発生せず同様の効果を有する。   The electrolyte membrane is an aromatic hydrocarbon electrolyte. In addition, perfluorosulfonic acid electrolytes (Nafion: registered by DuPont, Flemion: registered by Asahi Glass Co., Ltd., Aciplex Asahi Kasei Co., Ltd. )) And the like, the same effect is obtained without causing problems such as peeling.

図６は本発明に係る電解質構造体の製造フロー図である。
先ず、膜形成工程において、基材の表面に電解質膜を形成し膜付基材を形成し、次に、第１加湿工程において、膜付基材を加湿する。 FIG. 6 is a manufacturing flow diagram of an electrolyte structure according to the present invention .
First, in the film formation step, an electrolyte membrane is formed on the surface of the substrate to form a substrate with a film, and then the substrate with film is humidified in the first humidification step.

そして、塗布工程において、この膜付基材の電解質膜に触媒材を塗布し、第２加湿工程において、触媒材を塗布した膜付基材である触媒付基材を加湿する。   Then, in the coating process, a catalyst material is applied to the electrolyte membrane of the film-coated substrate, and in the second humidification process, the catalyst-coated substrate that is the film-coated substrate coated with the catalyst material is humidified.

触媒材を塗布した後、乾燥工程において、触媒付基材を乾燥する。
最後に、第３加湿工程において、触媒材を塗布した膜付基材を加湿する。 After apply | coating a catalyst material, a base material with a catalyst is dried in a drying process.
Finally, humidifying the third Oite enough to humidify Engineering, the catalyst material is applied a film-substrate.

すなわち、膜形成工程と塗布工程の間に第１加湿工程を、塗布工程と乾燥工程の間に第２加湿工程を、乾燥工程の後に第３加湿工程を各々設ける。 That is, a first humidification step is provided between the film formation step and the coating step, a second humidification step is provided between the coating step and the drying step, and a third humidification step is provided after the drying step .

図７は本発明で用いる膜付基材の加湿室を説明する図である。
膜形成工程の後に加湿室６１を設け、この加湿室６１内に加湿空気を吹き出す加湿ユニット６２を３つ設けたものである。そして、加湿室６１内に図矢印６３の方向に膜付基材２３を移動させ、この膜付基材２３の電解質膜２２・・・を塗布した側に向け加湿した空気を当て、膜付基材２３を加湿する。なお、６５・・・は膜付基材２３を回動自在に支持するローラである。 Figure 7 is Ru FIG der illustrating a humidification chamber for film-base material used in the present invention.
The humidification chamber 61 provided after enough film forming engineering, in which the humidifying unit 62 for blowing humidified air into the humidification chamber 61 provided three. And the base material 23 with a film | membrane is moved in the direction of the figure arrow 63 in the humidification chamber 61, the humidified air is applied toward the side which apply | coated the electrolyte membrane 22 ... of this base material 23 with a film | membrane, The material 23 is humidified. In addition, 65 ... is a roller which supports the base material 23 with a film so that rotation is possible.

なお、塗布工程と乾燥工程の間に設ける加湿室、加湿ユニット、及びローラの構成は図５と同一の構成であり、説明を省略する。 Incidentally, provided Ru pressurized moist chamber during the coating step and the drying step, the humidifying unit, and the roller arrangement has the same configuration as FIG. 5, the description thereof is omitted.

図６に戻って、膜形成工程と塗布工程の間に別の加湿工程である第１加湿工程を設けると、触媒材２５（図３参照）の塗布前に、膜付基材２３に好ましい湿分をもたせることができる。 Returning to FIG. 6, the provision of the first humidification step is another humidification step during the film forming step and the coating step, prior to application of the catalyst material 25 (see FIG. 3), preferably wet the membrane with the substrate 23 You can have minutes.

触媒材２５（図３参照）を塗布するための好ましい湿分を膜付基材２３にもたせることで、電解質膜２２と基材２１との間に大きな応力は発生しない。応力の発生は大きくないため、電解質膜２２と基材２１との間に剥離などは発生せず、電解質膜２２と基材２１の良好な密着度を維持しながら、触媒材２５を塗布することができる。
加えて、電解質膜２２に対する触媒材２５の塗布品質を向上することができる。 By applying a preferable moisture for applying the catalyst material 25 (see FIG. 3 ) to the film-coated substrate 23, no great stress is generated between the electrolyte membrane 22 and the substrate 21. Since the generation of stress is not large, peeling or the like does not occur between the electrolyte membrane 22 and the substrate 21, and the catalyst material 25 is applied while maintaining good adhesion between the electrolyte membrane 22 and the substrate 21. Can do.
In addition, the coating quality of the catalyst material 25 on the electrolyte membrane 22 can be improved.

塗布工程と乾燥工程の間に第２加湿工程（図７参照）を設けることで、触媒材２５（図３参照）塗布後における電解質膜２２の収縮を抑制することができる。 By providing the second humidification step (see FIG. 7) between the application step and the drying step, the shrinkage of the electrolyte membrane 22 after the application of the catalyst material 25 (see FIG. 3 ) can be suppressed.

このように、各工程の間に加湿工程５１、５２、５３を設け、電解質膜２２（図４参照）の湿分をきめ細かく制御することにより、電解質構造体が含む湿分の過小又は過大により、収縮又は膨張して、電解質膜２２が基材２１から剥離するなどの問題を解消することができる。   In this way, by providing the humidification steps 51, 52, 53 between each step and finely controlling the moisture of the electrolyte membrane 22 (see FIG. 4), the moisture contained in the electrolyte structure is too small or too large. The problem that the electrolyte membrane 22 peels from the base material 21 due to contraction or expansion can be solved.

図８は従来例と本発明とを比較した基材上の電解質膜の状態を説明する図である。
（ａ）は比較例であり、基材２１上には電解質膜２２が密着しているが、湿分が低いため電解質膜２２は収縮し、その一部は基材２１から剥離することを示す。
このように湿分が低いと、電解質膜２２が収縮し、電解質膜２２と基材２１の間に応力が発生し、電解質膜２２が基材２１から剥離する。あるいは、膜付基材２３が内側に反るなどの問題が発生する。 FIG. 8 is a diagram for explaining the state of the electrolyte membrane on the base material in which the conventional example and the present invention are compared.
(A) is a comparative example, in which the electrolyte membrane 22 is in close contact with the base material 21, but the electrolyte membrane 22 contracts due to low moisture content, and a part thereof peels from the base material 21. .
When the moisture is low in this way, the electrolyte membrane 22 contracts, stress is generated between the electrolyte membrane 22 and the substrate 21, and the electrolyte membrane 22 is peeled off from the substrate 21. Or the problem that the base material 23 with a film | membrane warps inside will generate | occur | produce.

（ｂ）は実施例であり、本発明に係る電解質構造体の製造方法において、膜形成工程（図６参照）と塗布工程の間に第１加湿工程を設けることにより、電解質膜２２の収縮はないか、軽微である。このため、基材２１と電解質膜２２との間の面６６に大きな応力は発生せず、基材２１上に電解質膜２２は密着したままであり、剥離しないことを示す。 (B) is an embodiment, in the manufacturing method of the electrolyte structure according to the present invention, by providing a more first humidification Engineering during the film forming step (see FIG. 6) and the coating process, the shrinkage of the electrolyte membrane 22 There are no or minor. Therefore, no large stress is generated on the surface 66 between the base material 21 and the electrolyte membrane 22, indicating that the electrolyte membrane 22 remains in close contact with the base material 21 and does not peel off.

以上、本発明に係る電解質構造体の製造方法によれば、膜付基材を形成する膜形成工程の雰囲気と同等の湿度（５０％）に調整した雰囲気中で加湿することによって、剥離やしわが防止でき、膜付基材の連続加工やローラによって折り返して加工する場合であっても、工程の品質を安定させることができる。 As mentioned above, according to the manufacturing method of the electrolyte structure which concerns on this invention, it peels by humidifying in the atmosphere adjusted to the humidity (50%) equivalent to the atmosphere of the film | membrane formation process which forms a base material with a film | membrane . It is possible to prevent wrinkles and to stabilize the quality of the process even in the case of continuous processing of a film-coated substrate or processing by folding back with a roller.

本発明は、燃料電池用の電解質構造体の製造に好適である。   The present invention is suitable for manufacturing an electrolyte structure for a fuel cell.

本発明で用いる膜付基材を説明する図である。It is a figure explaining the base material with a film used by the present invention. 図１の２−２線断面図である。It is a two-wire cross section - 2 of Figure 1. 本発明に係る触媒付基材の断面図である。It is a cross-sectional view of the engagement Ru catalysts substrate with the present invention. 本発明で用いる乾燥室を説明する図である。It is a figure explaining the drying chamber used by this invention. 本発明で用いる加湿室を説明する図である。It is a figure explaining the humidification chamber used by this invention. 本発明に係る電解質構造体の製造フロー図である。It is a manufacturing flow figure of the electrolyte structure concerning the present invention . 本発明で用いる膜付基材の加湿室を説明する図である。It is a figure explaining the humidification chamber of the base material with a film used by the present invention. 従来例と本発明とを比較した基材上の電解質膜の状態を説明する図である。It is a figure explaining the state of the electrolyte membrane on the base material which compared the prior art example and this invention. 従来の技術の基本構成を説明する図である。It is a figure explaining the basic composition of the conventional technology.

２１…基材、２１ａ…基材の表面、２２…電解質、２２ａ…電解質の表面、２３…膜付基材、２５…触媒材、２６…触媒付基材、３０…電解質構造体。   DESCRIPTION OF SYMBOLS 21 ... Base material, 21a ... Surface of base material, 22 ... Electrolyte, 22a ... Surface of electrolyte, 23 ... Base material with membrane, 25 ... Catalyst material, 26 ... Base material with catalyst, 30 ... Electrolyte structure.

Claims (1)

所定の湿度に調整した雰囲気中で、基材の表面に電解質膜を形成し膜付基材を得る膜形成工程と、
得られた前記膜付基材を前記所定の湿度と同等の湿度に調整した雰囲気中で加湿する第１加湿工程と、
加湿された前記膜付基材に触媒材を塗布して触媒付基材を得る塗布工程と、
得られた前記触媒付基材を前記所定の湿度と同等の湿度に調整した雰囲気中で加湿する第２加湿工程と、
加湿された前記触媒付基材を乾燥して乾燥体を得る乾燥工程と、
からなることを特徴とする電解質構造体の製造方法。 In an atmosphere adjusted to a predetermined humidity, a film forming step of forming an electrolyte membrane on the surface of the substrate to obtain a substrate with a film,
A first humidifying step of humidifying the obtained film-coated substrate in an atmosphere adjusted to a humidity equivalent to the predetermined humidity;
An application step of applying a catalyst material to the humidified base material with film to obtain a base material with catalyst;
A second humidifying step of humidifying the obtained base material with catalyst in an atmosphere adjusted to a humidity equivalent to the predetermined humidity;
A drying step of drying the humidified substrate with catalyst to obtain a dried body ;
Method for producing electrolyte structure, wherein the or Ranaru.
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