JPH0413826B2 - - Google Patents
Info
- Publication number
- JPH0413826B2 JPH0413826B2 JP57050638A JP5063882A JPH0413826B2 JP H0413826 B2 JPH0413826 B2 JP H0413826B2 JP 57050638 A JP57050638 A JP 57050638A JP 5063882 A JP5063882 A JP 5063882A JP H0413826 B2 JPH0413826 B2 JP H0413826B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon material
- fluorinated
- carbon
- fuel cell
- ethylene resin
- 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 - Lifetime
Links
- 239000003575 carbonaceous material Substances 0.000 claims description 24
- 239000000446 fuel Substances 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 3
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 150000002221 fluorine Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 238000005245 sintering Methods 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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/96—Carbon-based electrodes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inert Electrodes (AREA)
Description
【発明の詳細な説明】
この発明は、リン酸形燃料電池に使用する電極
基材に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode base material used in a phosphoric acid fuel cell.
第１図は従来のリン酸形燃料電池の電極基材の
一部拡大図で、１，２はフツ素化エチレン樹脂の
重合体で、カーボン材１に揆水性をもたせるため
のものである。 FIG. 1 is a partially enlarged view of the electrode base material of a conventional phosphoric acid fuel cell. Reference numerals 1 and 2 are polymers of fluorinated ethylene resin, which are used to impart water repellency to the carbon material 1.
従来、この電極基材は燃料電池の電池反応を行
なわせる場所である電池触媒層を支持するもので
あり、カーボン繊維を漉いて得られたポーラスな
カーボン材１にフツ素化エチレン樹脂重合体を含
浸させ、これを焼結してカーボン材１にフツ素化
エチレン樹脂の重合体２を付着させることにより
カーボン材１に揆水性を与えていた。 Conventionally, this electrode base material supports the cell catalyst layer, which is the place where the cell reaction of the fuel cell takes place, and is made by adding a fluorinated ethylene resin polymer to a porous carbon material 1 obtained by sifting carbon fibers. Water repellency was imparted to the carbon material 1 by impregnating it and sintering it to attach a polymer 2 of fluorinated ethylene resin to the carbon material 1.
しかし、このようにしてカーボン材１に付着さ
せたフツ素化エチレン樹脂２は、使用につれて剥
離してゆくため、揆水性が次第に悪くなり、電解
質溶液がしみ出てくるという欠点があつた。また
カーボン材１の細孔がフツ素化エチレン樹脂２で
ふさがれて透気性が悪くなり、電極触媒層におけ
る燃料電池の電極反応が制限されるため性能が落
ちるという欠点があつた。 However, the fluorinated ethylene resin 2 attached to the carbon material 1 in this manner peels off as it is used, resulting in a drawback that the water repellency gradually deteriorates and the electrolyte solution seeps out. In addition, the pores of the carbon material 1 are blocked by the fluorinated ethylene resin 2, resulting in poor air permeability, which limits the electrode reaction of the fuel cell in the electrode catalyst layer, resulting in a reduction in performance.
この発明は上記のような従来のものの欠点を除
去するためになされたもので、カーボン材の表面
をフツ素化して揆水性をもたせるものである。 This invention was made in order to eliminate the drawbacks of the conventional products as described above, and the surface of the carbon material is fluorinated to make it water repellent.
第２図はこの発明に係るカーボン材の一部拡大
図で、３はフツ素化されたカーボン繊維表面であ
る。 FIG. 2 is a partially enlarged view of the carbon material according to the present invention, and 3 is the surface of the fluorinated carbon fiber.
つぎにこのカーボン材１の製造方法を説明す
る。 Next, a method of manufacturing this carbon material 1 will be explained.
まず、カーボン材１を真空または不活性雰囲気
下で120℃で２時間加熱し、カーボン材を構成す
るカーボン繊維表面の不純物を取り除く。つぎに
350℃以上の温度に加熱し、フツ素ガスを導入し
て２時間その状態を維持する。このときフツ素ガ
スには水素化フツ素を含まないようにすることが
必要である。こののち冷却し、真空雰囲気下で加
熱した場合には不活性ガス雰囲気にしたのち、カ
ーボン材を取り出す。この処理により、カーボン
繊維の表面にはCF2または−CF3の側鎖が形成
されカーボン材１は揆水性を有するようになる。 First, the carbon material 1 is heated at 120° C. for 2 hours in a vacuum or an inert atmosphere to remove impurities on the surface of the carbon fibers constituting the carbon material. next
Heat to a temperature of 350°C or higher, introduce fluorine gas, and maintain that state for 2 hours. At this time, it is necessary that the fluorine gas does not contain hydrogenated fluorine. Thereafter, it is cooled, and if heated in a vacuum atmosphere, an inert gas atmosphere is created, and then the carbon material is taken out. Through this treatment, side chains of CF 2 or -CF 3 are formed on the surface of the carbon fibers, and the carbon material 1 becomes water-repellent.
なお、上記実施例ではカーボン材１の表面全体
をフツ素化したものを示したが、カーボン材の表
面の一部をマスクしてフツ素化しない部分を作つ
てもよい。 In the above embodiment, the entire surface of the carbon material 1 is fluorinated, but a portion of the surface of the carbon material 1 may be masked to create a portion that is not fluorinated.
このように、カーボン材の表面の一部にフツ素
化しない部分をつくることによりカーボン材の電
気導電性が良くなり、燃料電池の効率向上が図れ
る効果がある。 In this way, by creating a part of the surface of the carbon material that is not fluorinated, the electrical conductivity of the carbon material is improved, which has the effect of improving the efficiency of the fuel cell.
この発明はカーボン材を真空または不活性雰囲
気のもとにフツ素ガスを導入し、350℃以上に加
熱して上記カーボン材を組成するカーボン繊維の
表面をフツ素化したことを特徴とするもので、カ
ーボン材の揆水性の劣化を抑えることができ、ま
たカーボン材内の細孔をふさぐこともないため通
気性もよく、電池の性能を上げることができると
いう効果がある。 This invention is characterized by introducing fluorine gas into the carbon material under vacuum or inert atmosphere and heating it to 350°C or higher to fluorinate the surface of the carbon fibers that compose the carbon material. Therefore, it is possible to suppress deterioration of the water repellency of the carbon material, and since it does not block the pores in the carbon material, it has good air permeability and has the effect of improving the performance of the battery.
第１図は従来の揆水処理を施こしたカーボン材
の一部拡大図、第２図はこの発明に係るカーボン
材の一部拡大図である。
図において１はカーボン繊維、２はフツ化エチ
レン樹脂の重合体からなるバインダー、３はフツ
素化されたカーボン繊維表面である。なお図中同
一符号は同一部分を示す。
FIG. 1 is a partially enlarged view of a carbon material subjected to a conventional water repellent treatment, and FIG. 2 is a partially enlarged view of a carbon material according to the present invention. In the figure, 1 is a carbon fiber, 2 is a binder made of a polymer of fluorinated ethylene resin, and 3 is a fluorinated carbon fiber surface. Note that the same reference numerals in the figures indicate the same parts.
Claims (1)
ボン材で構成され、燃料電池における電極触媒層
を支持する燃料電池用電極基材において、上記カ
ーボン繊維の表面をフツ素化したことを特徴とす
る燃料電池用電極基材。1. A fuel cell electrode base material for a fuel cell that is composed of a porous carbon material formed of carbon fibers and supports an electrode catalyst layer in a fuel cell, characterized in that the surface of the carbon fibers is fluorinated. electrode base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050638A JPS58166647A (en) | 1982-03-26 | 1982-03-26 | Electrode base material for fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050638A JPS58166647A (en) | 1982-03-26 | 1982-03-26 | Electrode base material for fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166647A JPS58166647A (en) | 1983-10-01 |
| JPH0413826B2 true JPH0413826B2 (en) | 1992-03-10 |
Family
ID=12864494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57050638A Granted JPS58166647A (en) | 1982-03-26 | 1982-03-26 | Electrode base material for fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166647A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2670141B2 (en) * | 1989-05-12 | 1997-10-29 | 田中貴金属工業株式会社 | Water repellent method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4967135A (en) * | 1972-11-01 | 1974-06-28 |
-
1982
- 1982-03-26 JP JP57050638A patent/JPS58166647A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4967135A (en) * | 1972-11-01 | 1974-06-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58166647A (en) | 1983-10-01 |
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