JP5552229B2 - 長寿命の改良型膜電極ユニット及び燃料電池 - Google Patents
長寿命の改良型膜電極ユニット及び燃料電池 Download PDFInfo
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- JP5552229B2 JP5552229B2 JP2008525450A JP2008525450A JP5552229B2 JP 5552229 B2 JP5552229 B2 JP 5552229B2 JP 2008525450 A JP2008525450 A JP 2008525450A JP 2008525450 A JP2008525450 A JP 2008525450A JP 5552229 B2 JP5552229 B2 JP 5552229B2
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Images
Classifications
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- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/92—Metals of platinum group
- H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
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- H01M8/1069—Polymeric electrolyte materials characterised by the manufacturing processes
- H01M8/1086—After-treatment of the membrane other than by polymerisation
- H01M8/109—After-treatment of the membrane other than by polymerisation thermal other than drying, e.g. sintering
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
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Description
高分子電解質膜が、触媒層に接する内部領域と、ガス拡散層の表面上に形成されていない外部領域とを有し、
高分子電解質膜の内部領域の厚さが、5N/mm2の圧力で10分間の間に少なくとも5%減少し、
高分子電解質膜の外部領域の厚さが、内部領域の厚さより大きいことを特徴とする膜電極ユニットである。
本発明の目的に好適な高分子電解質膜は公知である。
Arは、相互に同一でも異なっていてもよく、単核でも多核でもよい四共有結合性の芳香族基又は複素芳香族基を表し、
Ar1は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性の芳香族基又は複素芳香族基を表し、
Ar2は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性又は三共有結合性の芳香族基又は複素芳香族基を表し、
Ar3は、相互に同一でも異なっていてもよく、単核でも多核でもよい三共有結合性の芳香族基又は複素芳香族基を表し、
Ar4は、相互に同一でも異なっていてもよく、単核でも多核でもよい三共有結合性の芳香族基又は複素芳香族基を表し、
Ar5は、相互に同一でも異なっていてもよく、単核でも多核でもよい四共有結合性の芳香族基又は複素芳香族基を表し、
Ar6は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性の芳香族基又は複素芳香族基を表し、
Ar7は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性の芳香族基又は複素芳香族基を表し、
Ar8は、相互に同一でも異なっていてもよく、単核でも多核でもよい三共有結合性の芳香族基又は複素芳香族基を表し、
Ar9は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性又は三共有結合性又は四共有結合性の芳香族基又は複素芳香族基を表し、
Ar10は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性又は三共有結合性の芳香族基又は複素芳香族基を表し、
Ar11は、相互に同一でも異なっていてもよく、単核でも多核でもよい二共有結合性の芳香族基又は複素芳香族基を表し、
Xは、相互に同一でも異なっていてもよく、酸素、硫黄、又は水素原子、炭素原子数が1〜20の基、好ましくは分岐又は非分岐のアルキル基又はアルコキシ基、又はアリール基をさらに含むアミノ基を表し、
Rは、相互に同一でも異なっていてもよく、水素、アルキル基又は芳香族基を表し、
nとmは、それぞれ10以上の整数、好ましくは100以上の整数である。)
好ましい芳香族又は複素芳香族基は、以下の化合物の誘導体であり、さらに置換されていてもよい:ベンゼン、ナフタレン、ビフェニル、ジフェニルエーテル、ジフェニルメタン、ジフェニルジメチルメタン、ビスフェノン、ジフェニルスルホン、キノリン、ピリジン、ビピリジン、ピリダジン、ピリミジン、ピラジン、トリアジン、テトラジン、ピロール、ピラゾール、アントラセン、ベンゾピロール、ベンゾトリアゾール、ベンゾオキサチアジアゾール、ベンゾオキサジアゾール、ベンゾピリジン、ベンゾピラジン、ベンゾピラジジン、ベンゾピリミジン、ベンゾトリアジン、インドリジン、キノリジン、ピリドピリジン、イミダゾピリミジン、ピラジノピリミジン、カルバゾール、アジリジン、フェナジン、ベンゾキノリン、フェノキサジン、フェノチアジン、アクリジジン、ベンゾプテリジン、フェナントロリン及びフェナントレン。
使用するポリアゾールは、特にポリベンズイミダゾールは、高分子量であることに特徴がある。固有粘度として、好ましくは少なくとも0.2dl/g、より好ましくは0.8〜10dl/g、特に1〜10dl/gである。
I)ポリマー、特にポリアゾールをリン酸に溶解する工程
II)工程I)で得られた溶液を、不活性ガス下で最大400℃の温度まで加熱する工程、
III)工程II)のポリマー溶液を用いて支持体上に膜を形成する工程、及び
IV)工程III)で得た膜を処理して自立的とする工程、
を有する方法により得られる。
A)一種以上の芳香族テトラアミノ化合物と、カルボン酸モノマー当たり少なくとも二個の酸基を含む一種以上の芳香族カルボン酸又はそのエステルとを混合して、あるいは一種以上芳香族及び/又は複素芳香族ジアミノカルボン酸をポリリン酸で混合して、溶液及び/又は分散液を形成する工程、
B)工程A)の混合物を用いて、支持体又は電極に層を形成する工程
C)工程B)で得られた平面構造物/層を、不活性ガス下で、最大350℃、好ましくは最大280℃の温度にまで加熱し、ポリアゾールポリマーを形成する工程、
D)工程C)で得た膜を(自立するまで)処理する工程、
を有する方法により得られる。
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、又は二共有結合性C5−C20アリール基又はヘテロアリール基を示し、式中、上記の基は、さらにハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立に、水素、C1−C15アルキル基、C1−C15アルコキシ基、エチレンオキシ基又はC5−C20アリール基又はヘテロアリール基を表し、上記の基はさらにハロゲン、−OH、−CNで置換されていてもよく、
xは、1、2、3、4、5、6、7、8、9、又は10の整数を表し、
yは、1、2、3、4、5、6、7、8、9、又は10の整数を表し)、
及び/又は、次式で表される化合物であり、
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、あるいは二共有結合性C5−C20アリール基又はヘテロアリール基を表し、上記の基はさらにハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立して、水素、C1−C15アルキル基、C1−C15アルコキシ基、エチレンオキシ基、又はC5−C20アリール又はヘテロアリール基を表し、上記の基はさらにハロゲン、−OH、−CNで置換されていてもよく、及び
xは、1、2、3,4、5、6、7、8、9、又は10の整数を表し)、
及び/又は、次式で表される化合物であり、
Aは、式COOR2、CN、CONR2 2、OR2及び/又はR2で表される基を表し、
R2は、水素、C1−C15アルキル基、C1−C15アルコキシ基、エチレンオキシ基、又はC5−C20アリール基又はヘテロアリール基であり、上記の基はさらにハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、又は二共有結合性C5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立して、水素、C1−C15アルキル基、エチレンオキシ基などのC1−C15アルコキシ基、又はC5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、で−CNで置換されていてもよく、
xは、1、2、3、4、5、6、7、8、9、又は10の整数である。)。
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、又は二共有結合性C5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立して、水素、C1−C15アルキル基、エチレンオキシ基などのC1−C15アルコキシ基、又はC5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、で−CNで置換されていてもよく、
xは、1、2、3、4、5、6、7、8、9、又は10の整数であり、
yは、1、2、3、4、5、6、7、8、9、又は10の整数である)
及び/又は、次式で表される化合物であり、
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、又は二共有結合性C5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立して、水素、C1−C15アルキル基、エチレンオキシ基などのC1−C15アルコキシ基、又はC5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、で−CNで置換されていてもよく、
xは、1、2、3、4、5、6、7、8、9、又は10の整数である)、
及び/又は、次式で表される化合物である。
Aは、式COOR2、CN、CONR2 2、OR2及び/又はR2で表される基を表し、式中、R2は、水素、C1−C15アルキル基、C1−C15アルコキシ基、エチレンオキシ基、又はC5−C20アリール基又はヘテロアリール基であり、上記の基はさらにハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Rは、単結合、二共有結合性C1−C15アルキレン基、エチレンオキシ基などの二共有結合性C1−C15アルキレンオキシ基、又は二共有結合性C5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、COOZ、−CN、NZ2で置換されていてもよく、
Zは、相互に独立して、水素、C1−C15アルキル基、エチレンオキシ基などのC1−C15アルコキシ基、又はC5−C20アリール基又はヘテロアリール基を表し、上記の基はハロゲン、−OH、で−CNで置換されていてもよく、
xは、1、2、3、4、5、6、7、8、9、又は10の整数である)。
Rは、C1−C15アルキル基、C5−C20アリール基又はヘテロアリール基、NR'、−SO2、PR'、Si(R')2を表し、上記の基は置換されていてもよく、
R'は、相互に独立に、水素、C1−C15アルキル基、C1−C15アルコキシ基、C5−C20アリール基又はヘテロアリール基を表し、nは少なくとも2である。)
上記のR基の置換基は、好ましくはハロゲン、ヒドロキシル、カルボキシ、カルボキシル、カルボキシルエステル、ニトリル、アミン、シリル、シロキサン基である。
特に好ましい架橋剤としては、アリルメタクリレート、エチレングリコールジメタクリレート、ジエチレングリコールジメタクリレート、トリエチレングリコールジメタクリレート、テトラエチレングリコールジメタクリレート及びポリエチレングリコールジメタクリレート、1,3−ブタンジオールジメタクリレート、グリセリンジメタクリレート、ジウレタンジメタクリレート、トリメチルプロパントリメタクリレート、エバクリルなどのエポキシアクリレート類、N',N−メチレンビスアクリルアミド、カルビノール、ブタジエン、イソプレン、クロロプレン、diビニルベンゼン及び/又はビスフェノール−A−ジメチルアクリレートが挙げられる。これらの化合物は、例えばCN−120、CN104やCN−980として、サートマー社(米国)より入手可能である。
このモル比は、従来法により測定可能である。このために、特に分光器を用いた方法が、例えばNMRスペクトルが使用可能である。この関係で、ホスホン酸基は、酸化段階が3であり、リン酸、ポリリン酸又はその加水分解物中のリンは酸化段階が5にあると考えるべきである。
1)一種以上の芳香族テトラアミノ化合物と、カルボン酸モノマー当たり少なくとも二個の酸基を含む一種以上の芳香族カルボン酸又はそのエステル類とを、あるいは一種以上の芳香族及び/又は複素芳香族ジアミノカルボン酸を、溶融状態で最高350℃の、好ましくは最高300℃の温度で反応させる工程、
2)工程1)で得られた固体プレポリマーをポリリン酸に溶解する工程、
3)工程2)で得られた溶液を不活性ガス下で、最高300℃、好ましくは最高280℃の温度まで加熱し、溶解ポリアゾールポリマーを形成する工程、
4)工程3)のポリアゾールポリマー溶液を用いて膜を形成する工程、
5)工程4)で形成した膜が自立するまで処理する工程、
を有する方法により実施する。
本発明の膜電極ユニットは、高分子電解質膜で隔てられた二層のガス拡散層を有する。電気伝導性で耐酸性の平面状構造物が、通常このために用いられる。これらの例としては、カーボンブラックを添加して導電性を付与した黒鉛繊維紙、炭素繊維紙、黒鉛布及び/又は黒鉛紙が挙げられる。これらの層を経由して、ガス流及び/又は液流が精密に運ばれる。
触媒層の一層または二層が、触媒活性物質を含んでいる。なかでもこのような物質としては、白金族の貴金属、例えばPt、Pd、Ir、Rh、Os、Ruや、貴金属のAuとAgが挙げられる。また、上記金属の合金も使用可能である。また、少なくとも一層の触媒層が、白金族元素と、Fe、Co、Ni、Cr、Mn、Zr、Ti、Ga、V等の非貴金属との合金を含んでいてもよい。また、上記の貴金属及び/又は非貴金属の酸化物を用いてもよい。
一般に、膜は耐圧性が比較的低い。燃料電池運転中の膜の破損を避けるため、圧縮を避けるように注意する必要がある。例えば、分離板を形成してもよい。
デュポン社の商品名カプトン(登録商標)FNで市販されている。
試験材料を、表面積が55×55mm2の大きさに切断し、それぞれ前もって80℃、120℃及び160℃に加熱した二枚のプレス板の間に挿入する。
図1は、本発明による膜電極ユニットの断面図であり、触媒層がガス拡散層の上に設けられており、
図2は、本発明による第二の膜電極ユニット断面図であり、触媒層がガス拡散層の上に設けられている。
350gのポリリン酸(PPA)を、機械的攪拌機とN2入口及び出口を備えた三つ口フラスコ中にある3.1gのテレフタル酸と4.0gの3,3',4,4'−テトラアミノビフェニルの混合物に添加した。この混合物を、攪拌下に、まず1時間で150℃に、ついで10時間かけて170℃に、ついで7時間かけて195℃に、最後に4時間かけて220℃に加熱した。
上述のPBI溶液より膜を製造した。このために、得られた混合物を、前もって加熱したドクターブレードで、1150μmの厚さにガラス板に塗布した。この膜を室温に冷却し、次いで室温の2lの50%H3PO4中で。24時間加水分解した。加水分解後の膜の厚さは1000μmであった。
上述のPBI溶液より膜を製造した。膜電極ユニットを製造するため、得られた混合物を加工して厚さが300μmで表面積が72mm×72mmの膜とした。
Claims (22)
- 高分子電解質膜により隔てられ、それぞれ触媒層に接するガス拡散層を有する膜電極ユニットであって、
高分子電解質膜が、触媒層に接する内部領域と、ガス拡散層の表面上に形成されていない外部領域とを有し、
高分子電解質膜の内部領域の厚さが15〜1000μmの範囲内にあり、5N/mm2の圧力で10分間の間に少なくとも5%減少し、
高分子電解質膜の外部領域の厚さが、内部領域の厚さより大きく、
高分子電解質膜がアルカリ性ポリマーを含み、リン酸でドープされており、当該高分子電解質膜のプロトン伝導性が、120℃の温度で、加湿を行わない条件下に、少なくとも1mS/cmであることを特徴とする膜電極ユニット。 - 高分子電解質膜の外部領域の厚さが、内部領域の厚さより、少なくとも20μm厚いことを特徴とする請求項1に記載の膜電極ユニット。
- 外部領域の厚さが、120〜2000μmの範囲内にあることを特徴とする請求項1又は2に記載の膜電極ユニット。
- 二層のガス拡散層の四つのエッジが高分子電解質膜と接していることを特徴とする請求項1〜3のいずれか1項に記載の膜電極ユニット。
- 外部領域が単一層構造を有することを特徴とする請求項1〜4のいずれか1項に記載の膜電極ユニット。
- 高分子電解質膜の外部領域が少なくとも一種のさらなる層を有することを特徴とする請求項1〜5のいずれか1項に記載の膜電極ユニット。
- 高分子電解質膜の外部領域が少なくとも一種の溶融性のポリマー層を有することを特徴とする請求項1〜6のいずれか1項に記載の膜電極ユニット。
- ポリマー層がフルオロポリマーからなることを特徴とする請求項7に記載の膜電極ユニット。
- 高分子電解質膜の内部領域の厚さに対する外部領域の厚さの比が、1より大きく、200以下の範囲にあることを特徴とする請求項1〜8のいずれか1項に記載の膜電極ユニット。
- 二層の触媒層のそれぞれが、少なくとも2cm2の大きさを有する電気化学的活性表面を有することを特徴とする請求項1〜9のいずれか1項に記載の膜電極ユニット。
- 高分子電解質膜が、ポリアゾールからなることを特徴とする請求項1〜10のいずれか1項に記載の膜電極ユニット。
- リン酸の濃度が少なくとも50質量%であることを特徴とする請求項1〜11のいずれか1項に記載の膜電極ユニット。
- 膜が、下記工程、
A)一種以上の芳香族テトラアミノ化合物と、カルボン酸モノマー当たり少なくとも二個の酸基を含む一種以上の芳香族カルボン酸又はそのエステルとを混合して、又は一種以上芳香族及び/又は複素芳香族ジアミノカルボキン酸をポリリン酸中に混合して、溶液及び/又は分散液を形成する工程、
B)工程A)の混合物を用いて支持体又は電極に層を形成する工程、
C)工程B)で得られた平面構造物/層を、不活性ガス下で、最大350℃、好ましくは最大280℃の温度に加熱して、ポリアゾールポリマーを形成する工程、
D)工程C)で得た膜を(自立するまで)処理する工程
を有する方法により得られたことを特徴とする請求項1〜12のいずれか1項に記載の膜電極ユニット。 - ドーピング度が3〜50であることを特徴とする請求項1〜13のいずれか1項に記載の膜電極ユニット。
- 少なくとも一種の電極が、圧縮性材料からなることを特徴とする請求項1〜14のいずれか1項に記載の膜電極ユニット。
- 少なくとも1個のスペーサを含むことを特徴とする請求項1〜15のいずれか1項に記載の膜電極ユニット。
- スペーサがフレームを形成することを特徴とする請求項16に記載の膜電極ユニット。
- スペーサの厚さが内部領域の全ての構成要素の厚さに対して50〜100%であることを特徴とする請求項16又は17に記載の膜電極ユニット。
- スペーサがポリマー層を有し、ポリマー層がポリフェニレン、フェノール樹脂、フエノキシ樹脂、ポリスルフィドエーテル、ポリフェニレンスルフィド、ポリエーテルスルホン、ポリイミン、ポリエーテルイミン、ポリアゾール、ポリベンズイミダゾール、ポリベンズオキサゾール、ポリベンゾチアゾール、ポリベンズオキサジアゾール、ポリベンゾトリアゾール、ポリホスファゼン、ポリエーテルケトン、ポリケトン、ポリエーテルエーテルケトン、ポリエーテルケトンケトン、ポリフェニレンアミド、ポリフェニレンオキサイド、ポリイミン、及び二種以上のこれらポリマーの混合物を含むことを特徴とする請求項16〜18のいずれか1項に記載の膜電極ユニット。
- 請求項1〜19のいずれか1項に記載の少なくとも一種の膜電極ユニットを有する燃料電池。
- 燃料電池が、少なくとも一種のスペーサを有することを特徴とする請求項20に記載の燃料電池。
- スペーサが、膜電極ユニットを囲むフレームを形成していることを特徴とする請求項21に記載の燃料電池。
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| DE102005038195.2 | 2005-08-12 | ||
| DE102005038195A DE102005038195A1 (de) | 2005-08-12 | 2005-08-12 | Verbesserte Membran-Elektrodeneinheiten und Brennstoffzellen mit langer Lebensdauer |
| PCT/EP2006/007767 WO2007019978A1 (de) | 2005-08-12 | 2006-08-05 | Verbesserte membran-elektrodeneinheiten und brennstoffzellen mit langer lebensdauer |
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| CN (1) | CN101238610B (ja) |
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| CA (1) | CA2615655A1 (ja) |
| DE (2) | DE102005038195A1 (ja) |
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| JP5105928B2 (ja) * | 2007-03-28 | 2012-12-26 | 三洋電機株式会社 | 燃料電池用電極、燃料電池用電極の作製方法、および燃料電池 |
| JP5481880B2 (ja) * | 2008-03-10 | 2014-04-23 | 東レ株式会社 | 電解質膜の製造方法 |
| EP2228857A1 (de) | 2009-03-06 | 2010-09-15 | Basf Se | Verbesserte Membran-Elektrodeneinheiten |
| JP2010257669A (ja) * | 2009-04-23 | 2010-11-11 | Toppan Printing Co Ltd | 膜電極接合体及びその製造方法並びに固体高分子形燃料電池 |
| US9168567B2 (en) * | 2010-03-05 | 2015-10-27 | Basf Se | Polymer membranes, processes for production thereof and use thereof |
| US8871385B2 (en) * | 2012-01-27 | 2014-10-28 | Battelle Energy Alliance, Llc | Electrodes including a polyphosphazene cyclomatrix, methods of forming the electrodes, and related electrochemical cells |
| JP5907054B2 (ja) * | 2012-12-14 | 2016-04-20 | トヨタ自動車株式会社 | 燃料電池の製造方法 |
| EP2869382B1 (en) | 2013-10-30 | 2018-12-12 | Basf Se | Improved membrane electrode assemblies |
| DE102016125355A1 (de) * | 2016-12-22 | 2018-06-28 | Audi Ag | Separatorplatte, Membran-Elektroden-Einheit und Brennstoffzelle |
| DE102018009747A1 (de) | 2018-12-14 | 2020-06-18 | Johns Manville Europe Gmbh | Hybride Gasdiffusionslage für elektrochemische Zellen |
| KR102908659B1 (ko) * | 2019-12-31 | 2026-01-06 | 현대자동차주식회사 | 촉매의 피독을 방지할 수 있는 연료전지용 전해질막 및 이의 제조방법 |
| DK180599B1 (en) * | 2020-01-20 | 2021-10-14 | Blue World Technologies Holding ApS | Apparatus and process for making acid-doped proton exchange membranes |
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| US4212714A (en) * | 1979-05-14 | 1980-07-15 | General Electric Company | Electrolysis of alkali metal halides in a three compartment cell with self-pressurized buffer compartment |
| US4333805A (en) * | 1980-05-02 | 1982-06-08 | General Electric Company | Halogen evolution with improved anode catalyst |
| DE69204834T2 (de) * | 1991-06-04 | 1996-04-04 | Ballard Power Systems | Gegliederte membranelektrodenanordnung für elektrochemische brennstoffzelle. |
| JPH06333582A (ja) * | 1993-05-25 | 1994-12-02 | Fuji Electric Co Ltd | 固体高分子電解質型燃料電池 |
| DE19509748C2 (de) * | 1995-03-17 | 1997-01-23 | Deutsche Forsch Luft Raumfahrt | Verfahren zur Herstellung eines Verbundes aus Elektrodenmaterial, Katalysatormaterial und einer Festelektrolytmembran |
| DE19509749C2 (de) * | 1995-03-17 | 1997-01-23 | Deutsche Forsch Luft Raumfahrt | Verfahren zur Herstellung eines Verbundes aus Elektrodenmaterial, Katalysatormaterial und einer Festelektrolytmembran |
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| WO2003081707A1 (en) * | 2002-03-25 | 2003-10-02 | Matsushita Electric Industrial Co., Ltd. | Electrolyte membrane/electrode union for fuel cell and process for producing the same |
| DE10220818A1 (de) * | 2002-05-10 | 2003-11-20 | Celanese Ventures Gmbh | Verfahren zur Herstellung einer gepfropften Polymerelektrolytmembran und deren Anwendung in Brennstoffzellen |
| DE10235360A1 (de) * | 2002-08-02 | 2004-02-19 | Celanese Ventures Gmbh | Membran-Elektrodeneinheiten mit langer Lebensdauer |
| DE102004035305A1 (de) * | 2004-07-21 | 2006-02-16 | Pemeas Gmbh | Verbesserte Membran-Elektrodeneinheiten und Brennstoffzellen mit hoher Lebensdauer |
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| KR20080034926A (ko) | 2008-04-22 |
| DE102005038195A1 (de) | 2007-02-15 |
| EP1915795A1 (de) | 2008-04-30 |
| KR101307010B1 (ko) | 2013-09-12 |
| JP2009505341A (ja) | 2009-02-05 |
| RU2008108805A (ru) | 2009-09-20 |
| DE502006009217D1 (de) | 2011-05-12 |
| ATE504098T1 (de) | 2011-04-15 |
| CA2615655A1 (en) | 2007-02-22 |
| US20080268321A1 (en) | 2008-10-30 |
| CN101238610B (zh) | 2012-11-28 |
| CN101238610A (zh) | 2008-08-06 |
| WO2007019978A1 (de) | 2007-02-22 |
| EP1915795B1 (de) | 2011-03-30 |
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