JPS6216512B2 - - Google Patents
Info
- Publication number
- JPS6216512B2 JPS6216512B2 JP55009513A JP951380A JPS6216512B2 JP S6216512 B2 JPS6216512 B2 JP S6216512B2 JP 55009513 A JP55009513 A JP 55009513A JP 951380 A JP951380 A JP 951380A JP S6216512 B2 JPS6216512 B2 JP S6216512B2
- Authority
- JP
- Japan
- Prior art keywords
- matrix
- sheet
- phosphoric acid
- ptfe
- bulking agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011159 matrix material Substances 0.000 claims description 23
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000003792 electrolyte Substances 0.000 claims description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004067 bulking agent Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GEIAQOFPUVMAGM-UHFFFAOYSA-N Oxozirconium Chemical compound [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
- H01M8/0293—Matrices for immobilising electrolyte solutions
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Description
【発明の詳細な説明】
本発明は燃料電池における電解質保持マトリツ
クスの製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for making an electrolyte retention matrix in a fuel cell.
マトリツクスの製法として、予めマトリツクス
をシート状に形成してこれをガス拡散電極間に挾
む方法と、電極表面にマトリツクス材を直接塗布
する方法とがある。前者はマトリツクス厚みを均
一化する点で有利であるが、薄層化がむつかしい
という問題があり、又後者は薄層化が容易で電極
との密着性が良好であるが、マトリツクス中にピ
ンホールができやすく、厚みの均一化がむつかし
いという問題がある。 There are two methods for manufacturing the matrix: one is to form the matrix in advance into a sheet and sandwich it between gas diffusion electrodes, and the other is to directly apply the matrix material to the electrode surface. The former is advantageous in terms of making the matrix thickness uniform, but has the problem that it is difficult to make the layer thin, and the latter is easy to make the layer thin and has good adhesion with the electrode, but there are pinholes in the matrix. The problem is that it is difficult to make the thickness uniform.
本発明は厚みが均一でしかも薄層化の可能なマ
トリツクスを提供するもので、マトリツクス材と
可溶性バルク剤との混合粉末に弗素樹脂デイスパ
ージヨンを加えて混練し、この混練物をシート状
に成型して後、前記パルク剤を溶液により溶出
し、水洗後前記シートに電解液を含浸せしめるこ
とを特徴とする。 The present invention provides a matrix that has a uniform thickness and can be made into a thin layer by adding a fluororesin dispersion to a mixed powder of a matrix material and a soluble bulk agent and kneading the mixture, and then forming the kneaded product into a sheet. After molding, the bulking agent is eluted with a solution, and after washing with water, the sheet is impregnated with an electrolytic solution.
実施例
マトリツクス材としてカーボランダム（SiC）
10ｇと酸化ジルコニウム（ZrO）30ｇとを用い、
可溶性バルク剤として酸化亜鉛（ZnO）40ｇを用
いる。これらの微細粉末を加圧式混合機で充分混
合した後、濃度60％の弗素樹脂（PTFE）デイス
パージヨン３mlおよび水20mlを加えてさらに混練
を続けると、PTFEの網目が形成されるにつれて
次第に粘性を増し、やがて１つの塊状物となる。Example Carborundum (SiC) as matrix material
Using 10g and 30g of zirconium oxide (ZrO),
40 g of zinc oxide (ZnO) is used as a soluble bulking agent. After thoroughly mixing these fine powders with a pressure mixer, 3 ml of fluoropolymer (PTFE) dispersion with a concentration of 60% and 20 ml of water are added and kneading is continued. As a PTFE network is formed, the viscosity gradually increases. increases, and eventually becomes a single lump.
これをローラーにて0.3mm厚みのシートに形成
した後、このシートを濃塩酸溶液中に１〜２時間
浸漬するとシート中の酸化亜鉛は溶液中に溶出す
る。溶液からとり出したシートを水洗後、濃度85
％の燐酸溶液（電解液）中に入れシート中の水を
燐酸と入れかえる。数度燐酸溶液を変換した後さ
らに減圧下で充分に燐酸を含浸させる。 After forming this into a 0.3 mm thick sheet using a roller, this sheet is immersed in a concentrated hydrochloric acid solution for 1 to 2 hours, and the zinc oxide in the sheet is eluted into the solution. After washing the sheet taken out of the solution with water, the concentration is 85.
% phosphoric acid solution (electrolyte) and replace the water in the sheet with phosphoric acid. After converting the phosphoric acid solution several times, it is thoroughly impregnated with phosphoric acid under reduced pressure.
このようにして得たマトリツクスを所定寸法に
切断し、これを一対のガス拡散電極間に挾んで第
１図に示すような単位電池を形成する。 The matrix thus obtained is cut to a predetermined size and placed between a pair of gas diffusion electrodes to form a unit cell as shown in FIG.
図において、１はマトリツクス、２，３は陰、
陽のガス拡散電極、４，５は夫々水素及び酸素の
各ガス供給通路６，７を形成したカーボン分離板
である。 In the figure, 1 is a matrix, 2 and 3 are shadows,
Positive gas diffusion electrodes 4 and 5 are carbon separator plates forming hydrogen and oxygen gas supply passages 6 and 7, respectively.
又第２図はこの電池の放電特性を示し、比較の
ため可溶性バルク材を混入しない従来方法による
マトリツクスを用いた場合を点線で示した。 Further, FIG. 2 shows the discharge characteristics of this battery, and for comparison, the case where a conventional matrix without mixing a soluble bulk material is used is shown by dotted lines.
本発明法によるマトリツクスは、マトリツクス
材及びこのマトリツクス材を分散保持するPTFE
の網目構成によつて電解液を保持するものである
が、シート作成時に混入されてシート作成後溶出
されるバルク剤を用いたため、このバルク剤溶出
によりPTFE網目構成部分が増加してそれだけ電
解液保持容量を増大すると共に、マトリツクス厚
みを従来の電極表面に直接塗布する方式のマトリ
ツクスと同程度まで薄くすることが可能となる。
又マトリツクス材に多量の可溶性バルク材を混入
して混練されるためPTFE網目の形成が促進され
て熱処理を施さなくとも充分な強度と電解液保持
能力をもつなどの特徴を有し、マトリツクスの均
一化、薄層化を達成してしかも電解液保持性を向
上することが出来る。 The matrix produced by the method of the present invention consists of a matrix material and a PTFE that disperses and holds this matrix material.
The electrolyte is retained by the network structure of the PTFE, but since we used a bulk agent that was mixed in during sheet production and eluted after the sheet was created, the PTFE network component increased due to the elution of the bulk agent, and the electrolyte was In addition to increasing the storage capacity, it is possible to reduce the thickness of the matrix to the same level as the conventional matrix applied directly to the electrode surface.
In addition, since a large amount of soluble bulk material is mixed into the matrix material and kneaded, the formation of a PTFE network is promoted, and it has characteristics such as sufficient strength and electrolyte retention ability without heat treatment, and a uniform matrix. It is possible to achieve thinner and thinner layers and to improve electrolyte retention.
第１図は本発明法によるマトリツクスを用いた
燃料電池の断面図、第２図は同上電池の放電特性
図である。
１……マトリツクス、２，３……陰陽のガス拡
散電極。
FIG. 1 is a sectional view of a fuel cell using a matrix according to the present invention, and FIG. 2 is a discharge characteristic diagram of the same battery. 1... Matrix, 2, 3... Yin and Yang gas diffusion electrodes.
Claims (1)
を弗素樹脂デイスパージヨンで混練し、この混練
物をシート状に形成して後前記バルク剤を溶出
し、水洗後シートに燐酸電解液を含浸せしめるこ
とを特徴とする燃料電池マトリツクスの製法。1 A mixture of a matrix material and a soluble bulking agent is kneaded in a fluororesin dispersion, this kneaded material is formed into a sheet, the bulking agent is eluted, and the sheet is washed with water and impregnated with a phosphoric acid electrolyte. Characteristic fuel cell matrix manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP951380A JPS56106376A (en) | 1980-01-29 | 1980-01-29 | Manufacture of matrix for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP951380A JPS56106376A (en) | 1980-01-29 | 1980-01-29 | Manufacture of matrix for fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56106376A JPS56106376A (en) | 1981-08-24 |
| JPS6216512B2 true JPS6216512B2 (en) | 1987-04-13 |
Family
ID=11722325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP951380A Granted JPS56106376A (en) | 1980-01-29 | 1980-01-29 | Manufacture of matrix for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56106376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06135241A (en) * | 1992-10-28 | 1994-05-17 | Kubota Corp | Door seal structure of tractor cabin |
-
1980
- 1980-01-29 JP JP951380A patent/JPS56106376A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06135241A (en) * | 1992-10-28 | 1994-05-17 | Kubota Corp | Door seal structure of tractor cabin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56106376A (en) | 1981-08-24 |
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