JP2009541915A - ガス拡散電極、膜−電極アセンブリー及びこれらを製造する方法 - Google Patents
ガス拡散電極、膜−電極アセンブリー及びこれらを製造する方法 Download PDFInfo
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- H01M4/88—Processes of manufacture
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- H01M4/8647—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites
- H01M4/8657—Inert electrodes with catalytic activity, e.g. for fuel cells consisting of more than one material, e.g. consisting of composites layered
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Abstract
【選択図】なし
Description
本発明の目的は、二重IBAD沈殿によって得られる、好ましくはパターン化された、少なくとも2種の金属の混合金属被膜をガス拡散媒体上に含む、ガス拡散電極(このガス拡散電極は、従来技術の制限を克服する。)を提供することにある。
発明者は、驚くべきことに、特に燃料電池への適用において、従来技術の二重IBAD単一金属被覆の利点を保持する一方で、特性が良好である混合金属を得るための最良の方法が、後に施される層に異なる金属を沈殿(析出)させることを含むことを見出した。二重IBAD金属被覆の、(特に、アイオノマー性フルオロカーボン成分が不存在の状態での、)特定の形態学(morphology)では、2種の異なる金属の2種の被覆層が、同一の金属による実際の合金に非常に近似した電気化学的特性を示す。このようにして得られた二元白金−コバルト及び白金−クロム被覆(被膜)は、燃料電池への適用に特に有利であることがわかったが、しかし、本発明には、2種以上の金属の他の組合せもその範囲に含まれる。
図1は、本発明の2種の分散電極の燃料電池構造内における定常状態の分極化曲線を、従来技術のものと比較して示している。
Claims (19)
- 電気導電性ウェブを、
エネルギーが500eVより高くない第1のイオンビームに付し、
次に、エネルギーが少なくとも500eVであり、且つ第1の金属のイオンを含む第2のイオンビームに付し、
そして、エネルギーが少なくとも500eVであり、且つ貴金属のイオンを含む、少なくとも第3のイオンビームに付す、
ことを特徴とする混合金属被膜をアイオノマー性成分が実質的に除去されたガス拡散媒体上に形成する方法。 - 前記第1の金属がコバルト又はクロムであることを特徴とする請求項1に記載の方法。
- 前記電気導電性ウェブを前記イオンビームに付す前に、前記電気導電性ウェブにパターン化したマスクを被せ、パターン化した混合金属被膜を得ることを特徴とする請求項1に記載の方法。
- 前記パターン化したマスクが、孔が設けられた薄い金属シート又はポリマーフィルムであることを特徴とする請求項3に記載の方法。
- 前記薄いパターン化したマスクが、化学的にエッチングした、薄い金属シートであることを特徴とする請求項3に記載の方法。
- 互いに隣り合う前記孔の中心間の距離が0.02〜0.5cmであることを特徴とする請求項4に記載の方法。
- 前記パターン化したマスクが、30〜80%の範囲に開口割合を有していることを特徴とする請求項3に記載の方法。
- 前記パターン化したマスクが、多角形格子であることを特徴とする請求項3に記載の方法。
- 前記多角形格子が、等間隔に配置された多角形孔を有し、この多角形孔は、円形状充填中心部を有し、及び、結果として得られるパターン化された貴金属被膜は、等間隔に配置され、且つ円形状の中心孔を有する多角形体を含むことを特徴とする請求項8に記載の方法。
- 混合金属被覆が、5〜250nmの範囲に合計厚さを有し、及び0.01〜0.3mg/cm2の積載量を有していることを特徴とする請求項1に記載の方法。
- 前記第1のイオンビームが、100〜500eVの範囲にエネルギーを有し、及び前記第2と第3のイオンビームが500〜2000eVの範囲にエネルギーを有することを特徴とする請求項1に記載の方法。
- 電気導電性のウェブ、
少なくとも1種の電気導電性充填物及び少なくとも1種の任意にフッ素化されたバインダーを含む非触媒化ガス拡散層、
及び請求項1に記載の方法によって得られた混合金属被膜、
を含むことを特徴とするガス拡散電極。 - 前記電気導電性充填物が、炭素原子を有することを特徴とする請求項12に記載のガス拡散電極。
- 前記分散層が1000ガーレー秒の平滑さを有することを特徴とする請求項13に記載のガス拡散電極。
- 請求項12に記載のガス拡散電極を少なくとも1個及び、イオン交換膜を有することを特徴とする膜−電極アセンブリー。
- 少なくとも1個の前記ガス拡散電極と前記イオン交換膜がホットプレスによって互いに結合されていることを特徴とする請求項15に記載の膜−電極アセンブリー。
- 前記貴金属が白金であることを特徴とする請求項1に記載の方法。
- 前記多角形が六角形であることを特徴とする請求項9に記載の方法。
- 前記炭素原子がアセチレンブラックカーボン粒子であることを特徴とする請求項13に記載のガス拡散電極。
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US69598405P | 2005-07-01 | 2005-07-01 | |
PCT/EP2006/006361 WO2007003363A1 (en) | 2005-07-01 | 2006-06-30 | Gas diffusion electrodes, membrane-electrode assemblies and method for the production thereof |
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JP5220599B2 JP5220599B2 (ja) | 2013-06-26 |
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US (1) | US8460841B2 (ja) |
EP (1) | EP1902484B1 (ja) |
JP (1) | JP5220599B2 (ja) |
KR (2) | KR20140018994A (ja) |
CN (1) | CN101273484B (ja) |
CA (1) | CA2613185C (ja) |
DK (1) | DK1902484T3 (ja) |
WO (1) | WO2007003363A1 (ja) |
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JP2013503967A (ja) * | 2009-09-03 | 2013-02-04 | インドゥストリエ・デ・ノラ・ソチエタ・ペル・アツィオーニ | 連続プロセスでの真空蒸着技術による電極表面の活性化 |
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KR20150057260A (ko) * | 2013-11-19 | 2015-05-28 | 한양대학교 산학협력단 | 리튬 공기 전지용 양극 및 이를 포함하는 리튬 공기 전지 |
CN111834638B (zh) * | 2019-04-19 | 2022-04-15 | 紫石能源有限公司 | 气体扩散电极及制备方法、电解装置 |
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WO2005124905A1 (en) * | 2004-06-18 | 2005-12-29 | Pemeas Gmbh | Gas diffusion electrodes, membrane-electrode assemblies and method for the production thereof |
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- 2006-06-30 WO PCT/EP2006/006361 patent/WO2007003363A1/en active Application Filing
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Cited By (1)
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JP2013503967A (ja) * | 2009-09-03 | 2013-02-04 | インドゥストリエ・デ・ノラ・ソチエタ・ペル・アツィオーニ | 連続プロセスでの真空蒸着技術による電極表面の活性化 |
Also Published As
Publication number | Publication date |
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US8460841B2 (en) | 2013-06-11 |
EP1902484B1 (en) | 2017-09-06 |
JP5220599B2 (ja) | 2013-06-26 |
EP1902484A1 (en) | 2008-03-26 |
US20100047667A1 (en) | 2010-02-25 |
DK1902484T3 (en) | 2017-12-18 |
CN101273484A (zh) | 2008-09-24 |
CA2613185C (en) | 2014-09-30 |
WO2007003363A1 (en) | 2007-01-11 |
KR20080033229A (ko) | 2008-04-16 |
KR101386857B1 (ko) | 2014-04-24 |
CA2613185A1 (en) | 2006-06-30 |
CN101273484B (zh) | 2011-01-19 |
KR20140018994A (ko) | 2014-02-13 |
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