JPH0157465B2 - - Google Patents
Info
- Publication number
- JPH0157465B2 JPH0157465B2 JP56007457A JP745781A JPH0157465B2 JP H0157465 B2 JPH0157465 B2 JP H0157465B2 JP 56007457 A JP56007457 A JP 56007457A JP 745781 A JP745781 A JP 745781A JP H0157465 B2 JPH0157465 B2 JP H0157465B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- gas separation
- separation plate
- layers
- gas
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 239000010439 graphite Substances 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000009830 intercalation Methods 0.000 claims description 9
- 230000002687 intercalation Effects 0.000 claims description 9
- 239000000446 fuel Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 18
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000005309 metal halides Chemical class 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910001508 alkali metal halide Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- -1 etc.) Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0204—Non-porous and characterised by the material
- H01M8/0213—Gas-impermeable carbon-containing materials
-
- 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
- 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】
本発明は酸性電解液を用いる燃料電池のガス分
離板に係り、特に黒鉛層間化合物を基材として用
いることにより、電気伝導性が良好でしかも機械
的強度の大きい炭素質分離板を提供するものであ
る。Detailed Description of the Invention The present invention relates to a gas separation plate for a fuel cell using an acidic electrolyte, and in particular, by using a graphite intercalation compound as a base material, a carbonaceous material with good electrical conductivity and high mechanical strength is produced. It provides a separation plate.
単位セル間に介在するガス分離板は、その両面
に夫々水素及び酸素（空気）の各供給路を形成
し、これら両ガスの分離体及び単位セル間の接続
導体として働くもので、その製法は通常黒鉛粉末
にフエノール樹脂や弗化ビニリデン樹脂などの結
着剤粉末を混合して加熱成型する方式が採用され
ている。しかし機械的強度をもたせるために混入
樹脂量は黒鉛量の20〜30％を要し、無孔質となつ
てガス分離能は良好であるが、電気伝導性が低下
するという問題があつた。 The gas separation plate interposed between the unit cells forms supply paths for hydrogen and oxygen (air) on both sides, and acts as a separator for these two gases and as a connecting conductor between the unit cells.The manufacturing method is as follows: Usually, a method is adopted in which graphite powder is mixed with binder powder such as phenol resin or vinylidene fluoride resin and then heated and molded. However, in order to provide mechanical strength, the amount of mixed resin needs to be 20 to 30% of the amount of graphite, and although it becomes non-porous and has good gas separation ability, there is a problem that electrical conductivity decreases.
本発明は黒鉛の層間に硫酸又は燐酸を混入させ
た黒鉛層間化合物を用いることにより、機械的強
度、ガス分離能を損うことなく、電気伝導度の良
好なガス分離板を得ることを目的とする。 The purpose of the present invention is to obtain a gas separation plate with good electrical conductivity without impairing mechanical strength or gas separation ability by using a graphite intercalation compound in which sulfuric acid or phosphoric acid is mixed between graphite layers. do.
黒鉛は六角板状扁平面が層状に積み重なつた構
造を持ち、層平面内の結合は強いが層間の結合は
弱く、多くの化学種が層間に入つて黒鉛層間化合
物を形成する。黒鉛の層間に侵入するものとして
はアルカリ金属（Li、Na、Ｋ等）、金属ハロゲン
化物（Alcl3、Mgcl2等）、酸（HNO3、H2SO4
等）がある。 Graphite has a structure in which hexagonal plate-like flat surfaces are stacked in layers, and the bonds within the layer planes are strong, but the bonds between the layers are weak, and many chemical species enter between the layers to form graphite intercalation compounds. Things that invade between the layers of graphite include alkali metals (Li, Na, K, etc.), metal halides (Alcl 3 , Mgcl 2, etc.), and acids (HNO 3 , H 2 SO 4
etc.).
これら層間化合物では黒鉛の構造は保たれた
まゝで電気伝導度は良くなる。アルカリ金属、金
属ハロゲン化物等の黒鉛層間化合物は酸性電解液
による腐蝕が起り所期の目的を達成できない。そ
こで本発明では酸の黒鉛層間化合物を用いてガス
分離板を作成した。 These intercalation compounds improve electrical conductivity while maintaining the structure of graphite. Graphite intercalation compounds such as alkali metals and metal halides are corroded by acidic electrolytes and cannot achieve their intended purpose. Therefore, in the present invention, a gas separation plate was created using an acidic graphite intercalation compound.
実施例 １
黒鉛と濃硫酸を乾燥雰囲気中で混合し、不活性
ガス中で300℃５時間反応させた。この反応生成
物を粉砕して400メツシユパスの微粉体とした。Example 1 Graphite and concentrated sulfuric acid were mixed in a dry atmosphere and reacted in an inert gas at 300°C for 5 hours. This reaction product was ground into a fine powder of 400 mesh passes.
この黒鉛層間化合物粉末に重量比で10％のフエ
ノール樹脂微粉末を混合し、180℃の温度に保ち
つつ300Kg／cm2の圧力で１分間加熱成型した。こ
のガス分離板は曲げ強度で100〜200Kg／cm2、電気
抵抗で0.1Ω−cm以下であつた。 This graphite intercalation compound powder was mixed with 10% by weight fine phenolic resin powder, and heated and molded for 1 minute at a pressure of 300 kg/cm 2 while maintaining the temperature at 180°C. This gas separation plate had a bending strength of 100 to 200 Kg/cm 2 and an electrical resistance of 0.1 Ω-cm or less.
実施例 ２
黒鉛と乾燥した燐酸を乾燥雰囲気中で混合し、
不活性ガス中で400℃、24時間反応させた。この
反応化成物を実施例１と同様の方法でガス分離板
に作成した。このガス分離板は曲げ強度で100〜
200Kg／cm2電気抵抗0.2Ω−cm以下であつた。Example 2 Graphite and dry phosphoric acid were mixed in a dry atmosphere,
The reaction was carried out at 400°C for 24 hours in an inert gas. This reaction compound was prepared into a gas separation plate in the same manner as in Example 1. This gas separation plate has a bending strength of 100~
200Kg/cm 2 Electrical resistance was 0.2Ω-cm or less.
陰陽のガス拡散電極は予め揆水処理を施したカ
ーボンペーパー（防水層）上に触媒付着炭素粉末
を塗着した二重層極板を用い、又燐酸電解液はジ
ルコニヤ、シリコンカーバイトなどの無機質多孔
性微粉末を弗素樹脂で結着してなるマトリツクス
に含浸した。 The Yin-Yang gas diffusion electrode uses a double-layer electrode plate with catalyst-attached carbon powder coated on carbon paper (waterproof layer) that has been subjected to water repellent treatment in advance, and the phosphoric acid electrolyte is made of porous inorganic material such as zirconia or silicon carbide. The fine powder was impregnated into a matrix bound with fluororesin.
図面は燃料電池の要部断面図で、１，２は陰陽
のガス拡散電極、３は電解液保持マトリツクス、
４，４は本発明によるガス分離板で、５は水素ガ
ス通路、６は空気通路を示す。 The drawing is a sectional view of the main parts of the fuel cell, with 1 and 2 showing the positive and negative gas diffusion electrodes, 3 showing the electrolyte retention matrix,
4, 4 is a gas separation plate according to the present invention, 5 is a hydrogen gas passage, and 6 is an air passage.
本発明によるガス分離板は、黒鉛の層間に酸を
含浸処理した黒鉛層間化合物を基材として用いた
ので、従来の黒鉛を用いたものに比し電気伝導度
は２〜５倍程度良好となり、そのため電池堆の抵
抗損失が少なくなると共に機械的強度、ガス分離
能を損うこともなく、大電流放電での特性が著し
く改善される。 Since the gas separation plate according to the present invention uses a graphite intercalation compound obtained by impregnating acid between graphite layers as a base material, the electrical conductivity is about 2 to 5 times better than that of conventional graphite. Therefore, the resistance loss of the battery stack is reduced, the mechanical strength and gas separation ability are not impaired, and the characteristics in large current discharge are significantly improved.
図面は本発明によるガス分離板を備える燃料電
池の要部斜面図である。
１，２……陰、陽ガス拡散電極、３……マトリ
ツクス、４……ガス分離板、５……水素ガス通
路、６……空気通路。
The drawing is a perspective view of essential parts of a fuel cell equipped with a gas separation plate according to the present invention. 1, 2... negative and positive gas diffusion electrodes, 3... matrix, 4... gas separation plate, 5... hydrogen gas passage, 6... air passage.
Claims (1)
を結着せしめたことを特徴とする燃料電池のガス
分離板。1. A gas separation plate for a fuel cell characterized by binding a graphite intercalation compound in which acid is infiltrated between layers of graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56007457A JPS57121165A (en) | 1981-01-20 | 1981-01-20 | Gas separation plate of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56007457A JPS57121165A (en) | 1981-01-20 | 1981-01-20 | Gas separation plate of fuel cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57121165A JPS57121165A (en) | 1982-07-28 |
| JPH0157465B2 true JPH0157465B2 (en) | 1989-12-06 |
Family
ID=11666344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56007457A Granted JPS57121165A (en) | 1981-01-20 | 1981-01-20 | Gas separation plate of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57121165A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63139012A (en) * | 1986-11-29 | 1988-06-10 | Koa Sekiyu Kk | Production of graphitic material for electric cell |
-
1981
- 1981-01-20 JP JP56007457A patent/JPS57121165A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57121165A (en) | 1982-07-28 |
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