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アニオン伝導ブロックポリ ((アリレンエーテル):合成,特性,およびアルカリ燃料電池における応用
Manabu Tanaka1, Keita Fukasawa, Eriko Nishino
1Fuel Cell Nanomaterials Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan.
Journal of the American Chemical Society
|June 11, 2011
まとめ
新しいアニオン伝導性マルチブロックコポリマーは,燃料電池の優れた水酸化イオン伝導性と耐久性を提供します. これらの四極化ポリアリレンエーテルは,ヒドラジン燃料電池で優れた性能を示し,先進的なエネルギー貯蔵ソリューションの道を開いています.
科学分野:
- ポリマー化学のポリマー化学について
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
背景:
- 効率的なアニオン交換膜 (AEM) の開発は,アルカリ燃料電池にとって極めて重要です.
- 既存のAEMは,しばしば,不十分な導電性,安定性,または高いコストに苦しんでいます.
- アロマティックマルチブロックコポリマーは,改善されたイオン輸送と機械的強度のために調整可能な特性を提供します.
研究 の 目的:
- アニオン伝導性アロマティックマルチブロックコポリマー (QPE) の新型合成と特徴付け,四極化アンモニア置換フッ素基を用いる.
- これらのQPEの性能を直接ヒドラジン燃料電池の膜として評価する.
- 開発された膜の伝導性,相分離,耐久性を評価する.
主な方法:
- ヒドロフィールとヒドロホビックオリゴマーのコポリコンデンサをブロックする.
- クロロメチル化,クォーターニゼーション,イオン交換反応により,機能群を導入する.
- 構造分析のためのスキャニング伝送電子顕微鏡 (STEM).
- (1) 降解の評価のためのH NMRスペクトロスコーピー.
- 性能を評価するための燃料電池試験.
主要な成果:
- よく制御されたマルチブロック構造を持つ柔らかく透明なQPE膜を成功裏に合成しました.
- 水性/水性性相分離と相互接続されたイオン輸送経路を達成しました.
- 証明された高ヒドロキシドイオン伝導度 (80°Cで最大144mS/cm),既存のAEMを上回る.
- 優れた耐久性を発揮し,80°Cの熱水で5000時間放置した後も高い伝導性を保持しています.
- 高貴金属のない直接ヒドラジン燃料電池を80°Cで最大297mW/cmの最大出力密度で稼働させました.
結論:
- QPE膜は,アニオン伝導性アプリケーション,特に燃料電池で有望な性質を示しています.
- マルチブロックアーキテクチャは,高いイオン伝導性と機械的安定性を達成するための鍵です.
- これらの材料は,クリーンエネルギー技術のための高性能で耐久性の高いAEMの開発における重要な進歩を表しています.
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