JP6122617B2 - 疎水性を向上させた高分子電解質膜電極接合体及びその製造方法 - Google Patents
疎水性を向上させた高分子電解質膜電極接合体及びその製造方法 Download PDFInfo
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Description
また、本発明による高分子電解質膜電極接合体は、工程が簡素であり商業化が容易である利点がある。
本発明のMEAは、触媒層の表面触媒担持体に形成した高アスペクト比のナノパターン及び疎水性薄膜を含んで構成される。
表面処理−1と表面処理−3でそれぞれプラズマエッチングにより表面処理した前後の写真を撮影し、その測定結果を図2及び図3に示した。
図2の(A)はMEA触媒層の酸素プラズマエッチング前、および(C)は表面処理−1による酸素プラズマエッチング30分処理後の走査電子顕微鏡(SEM:Scanning Electron Microscopy)写真である。図2の(B)は酸素プラズマエッチング前、および(D)と(E)は酸素プラズマエッチング30分処理後の透過電子顕微鏡(TEM:Transmission Electron Microscopy)写真である。
MEAの触媒層表面に5μLの水滴を注意深く滴下(Gentle Landing)し、MEA触媒層表面の静的接触角(Static Contact Angle)を、ゴニオメーター(Goniometer)〔Data Physics Instrument GmbH社製、“OCA 20L”〕を用いて測定した。図4は、水滴の形状を撮影した光学顕微鏡の写真である。図中、(A)はプラズマエッチング処理前(すなわち、超疎水性表面の処理前)、(B)表面処理−2で酸素プラズマエッチングによりで30分処理した後、疎水性カーボンナノ薄膜をコーティングして超疎水性化、(C)は表面処理−4でCF4プラズマエッチングにより30分処理した後、疎水性カーボンナノ薄膜をコーティングして超疎水性化した結果である。ゴニオメーターは、表面に固着された水滴(Sessile Droplet)の光学的写真撮影と接触角の測定が可能である。
表面処理−5により酸素プラズマエッチングあるいはCF4プラズマエッチングを異なる処理時間で行った後の表面静的接触角を、実施例2と同様にして、ゴニオメーターを用いてそれぞれ測定した。結果を図5に示した。
Claims (10)
- 高分子電解質膜電極接合体(MEA)を構成する触媒層の表面触媒担持体にプラズマエッチングして高アスペクト比のナノサイズの突起によって形成された凹凸構造を形成する段階と、
前記触媒担持体に形成された前記凹凸構造上に疎水性薄膜を形成する段階と、を含むことを特徴とする疎水性を向上させた高分子電解質膜電極接合体の製造方法。 - 前記凹凸構造を形成する段階では、プラズマエッチングのためのプラズマの照射時間、加速電圧、及びエッチング圧力のうち何れか1つ以上を調節して凹凸構造のサイズ及び形状を制御することを特徴とする請求項1に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 前記プラズマエッチングのためのプラズマの加速電圧は−100Vb〜−1000Vbであり、プラズマのエッチング圧力は1Pa〜10Paであることを特徴とする請求項2に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 前記プラズマエッチングには、イオンビーム方式、ハイブリッドプラズマ化学蒸着方式、及び大気圧プラズマ方式からの1つ以上を選択して行うことを特徴とする請求項1に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 前記プラズマエッチングは、プラズマ化学蒸着(PECVD)方式またはプラズマーアシスト化学蒸着(PACVD)方式であることを特徴とする請求項1に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 前記疎水性薄膜は、ケイ素と酸素を含む炭化水素系薄膜、またはフッ素を含む炭化水素系薄膜であることを特徴とする請求項1に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 前記疎水性薄膜は、1〜100nmの厚さであることを特徴とする請求項1または6に記載の疎水性を向上させた高分子電解質膜電極接合体の製造方法。
- 触媒層の表面触媒担持体に高アスペクト比のナノサイズの突起によって形成された凹凸構造が形成され、前記凹凸構造上に疎水性薄膜が形成されることにより、超疎水性表面を有することを特徴とする疎水性を向上させた高分子電解質膜電極接合体。
- 前記疎水性薄膜は、ケイ素と酸素を含む炭化水素系薄膜、またはフッ素を含む炭化水素系薄膜であることを特徴とする請求項8に記載の疎水性を向上させた高分子電解質膜電極接合体。
- 前記疎水性薄膜は、1〜100nmの厚さであることを特徴とする請求項8または9に記載の疎水性を向上させた高分子電解質膜電極接合体。
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| KR1020120070376A KR101438890B1 (ko) | 2012-06-28 | 2012-06-28 | 소수성을 향상한 고분자 전해질 막-전극 접합체 및 그 제조방법 |
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- 2012-11-23 CN CN201210482803.6A patent/CN103515623B/zh active Active
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| Publication number | Publication date |
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| CN103515623B (zh) | 2018-06-12 |
| DE102012220953A1 (de) | 2014-01-02 |
| KR101438890B1 (ko) | 2014-09-15 |
| KR20140002287A (ko) | 2014-01-08 |
| US20140004443A1 (en) | 2014-01-02 |
| US8703354B2 (en) | 2014-04-22 |
| JP2014011154A (ja) | 2014-01-20 |
| CN103515623A (zh) | 2014-01-15 |
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