JP2023500598A - 高分子電解質膜、それを含む膜-電極アセンブリ及び燃料電池 - Google Patents
高分子電解質膜、それを含む膜-電極アセンブリ及び燃料電池 Download PDFInfo
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Abstract
Description
本発明の目的は、上記に触れた目的に限定されず、触れていない本発明の別の目的及び利点は、下記の説明によって理解することができ、本発明の実施例によってより明確に理解することができるはずである。また、本発明の目的及び利点は、特許請求の範囲に示された手段及びその組み合わせによって実現することができるということが容易にわかるはずである。
多孔度(%)=(空気の体積/全体積)×100
Claims (18)
- 多孔性支持体;及び
前記多孔性支持体に充填された第1アイオノマーを含む複合層(composite layer)を含む高分子電解質膜であって、
前記電解質膜は、第1耐久性を有する第1セグメント及び第2耐久性を有する第2セグメントを含み、
前記第1耐久性は前記第2耐久性より高い高分子電解質膜。 - 前記第1セグメントは、前記第1サブ層及び前記第1サブ層上に配置された第2サブ層を含み、
前記第2セグメントは、単一層構造を有し、
前記第1サブ層及び前記第2セグメントは、第1アイオノマーを含み、
前記第2サブ層は、第2アイオノマーを含み、
前記第2アイオノマーの耐久性は、前記第1アイオノマーの耐久性より高い、請求項1に記載の高分子電解質膜。 - 前記第1サブ層及び前記第2セグメントは並べて配列された、請求項2に記載の高分子電解質膜。
- 前記第1アイオノマーは、第1フッ素系アイオノマーを含み、
前記第2アイオノマーは、第2フッ素系アイオノマーを含み、
前記第2フッ素系アイオノマーのEW(Equivalent Weight)は、前記第1フッ素系アイオノマーのEWより大きい、請求項2に記載の高分子電解質膜。 - 前記第1フッ素系アイオノマーは、600~800g/eqのEWを有するパーフルオロスルホン酸系(PFSA-based)アイオノマーを含み、
前記第2フッ素系アイオノマーは、900~1100g/eqのEWを有するパーフルオロスルホン酸系アイオノマーを含む、請求項4に記載の高分子電解質膜。 - 前記第2フッ素系アイオノマーと前記第1フッ素系アイオノマーとのEWの差は、100~500g/eqである、請求項4に記載の高分子電解質膜。
- 前記第1アイオノマーは、第3フッ素系アイオノマーを含み、
前記第2アイオノマーは、第4フッ素系アイオノマー及び炭化水素系アイオノマーのブレンドを含む、請求項2に記載の高分子電解質膜。 - 前記第2アイオノマーのイオン交換容量(Ion Exchange Capacity、IEC)は、0.8~1.9meq/gである、請求項7に記載の高分子電解質膜。
- 前記第3及び第4フッ素系アイオノマーは、それぞれ独立的に、500~1100g/eqのEWを有するパーフルオロスルホン酸系アイオノマーを含む、請求項7に記載の高分子電解質膜。
- 前記第3フッ素系アイオノマーは、600~800g/eqのEWを有し、
前記第4フッ素系アイオノマーは、500~1100g/eqのEWを有する、請求項9に記載の高分子電解質膜。 - 前記第4フッ素系アイオノマーは、700~900g/eqのEWを有する、請求項10に記載の高分子電解質膜。
- 前記炭化水素系アイオノマーは、スルホン化ポリイミド(sulfonated polyimide:S-PI)、スルホン化ポリアリールエーテルスルホン(sulfonated polyarylethersulfone:S-PAES)、スルホン化ポリエーテルエーテルケトン(sulfonated polyetheretherketone:SPEEK)、スルホン化ポリベンゾイミダゾール(sulfonated polybenzimidazole:SPBI)、スルホン化ポリスルホン(sulfonated polysulfone:S-PSU)、スルホン化ポリスチレン(sulfonated polystyrene:S-PS)、スルホン化ポリホスファゼン(sulfonated polyphosphazene)、スルホン化ポリキノキサリン(sulfonated polyquinoxaline)、スルホン化ポリケトン(sulfonated polyketone)、スルホン化ポリフェニレンオキシド(sulfonated polyphenylene oxide)、スルホン化ポリエーテルスルホン(sulfonated polyether sulfone)、スルホン化ポリエーテルケトン(sulfonated polyether ketone)、スルホン化ポリフェニレンスルホン(sulfonated polyphenylene sulfone)、スルホン化ポリフェニレンスルファイド(sulfonated polyphenylene sulfide)、スルホン化ポリフェニレンスルファイドスルホン(sulfonated polyphenylene sulfide sulfone)、スルホン化ポリフェニレンスルファイドスルホンニトリル(sulfonated polyphenylene sulfide sulfone nitrile)、スルホン化ポリアリーレンエーテル(sulfonated polyarylene ether)、スルホン化ポリアリーレンエーテルニトリル(sulfonated polyarylene ether nitrile)、スルホン化ポリアリーレンエーテルエーテルニトリル(sulfonated polyarylene ether ether nitrile)、スルホン化ポリアリーレンエーテルスルホンケトン(sulfonated polyarylene ether sulfone ketone)からなる群から選択された一つ以上を含む、請求項7に記載の高分子電解質膜。
- 前記第3フッ素系アイオノマー及び前記第4フッ素系アイオノマーは、互いに同一である、請求項7に記載の高分子電解質膜。
- 前記第1セグメントは、前記高分子電解質膜の一面を基準として、全活性面積の50%以下を占める、請求項1に記載の高分子電解質膜。
- 前記複合層は、第1面及び前記第1面と反対の第2面を含み、
前記高分子電解質膜は、
前記第1面上に配置されている第1樹脂層;及び
前記第2面上に配置されている第2樹脂層;
をさらに含み、
前記第1及び第2樹脂層は前記第1アイオノマーを含む、請求項1に記載の高分子電解質膜。 - 第1電極;
第2電極;及び
前記第1及び第2電極の間に介在する、請求項1に記載の高分子電解質膜;
を含む、膜-電極アセンブリ。 - 前記第1電極は、酸素の還元反応が起こる還元極(cathode)であり、
前記第2電極は、水素の酸化反応が起こる酸化極(anode)である、請求項16に記載の膜-電極アセンブリ。 - 第1セパレータ;
第2セパレータ;及び
前記第1及び第2セパレータの間に介在する、請求項16に記載の膜-電極アセンブリ;
を含むが、但し、
前記第1電極は、前記第1セパレータと前記高分子電解質膜との間に配置され、
前記第1セパレータは、
前記第1電極に供給される第1ガスのための第1流入口(inlet)、前記第1ガスのための第1排出口(outlet)、及び前記第1流入口と前記第1排出口との間の第1流動チャンネル(flow channel)を含み、
前記第1セグメントは、
前記第1流入口又は前記第1排出口に対応するセグメントである、
燃料電池。
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