ナノ構造のPOSSクロスリンクされたポリベンジミダゾールは,高温プロトン交換膜のためのフリーラジカルスキャビング機能を有する
Chao Meng1,2, Xiaofeng Hao1,3, Shuanjin Wang1
1The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, China.
Nanomaterials (Basel, Switzerland)
|February 12, 2026
まとめ
この研究は,燃料電池の性能を改善するために,機能化された多面性オリゴメリックシルセキオキサン (POSS) を使用した新しい高温プロトン交換膜 (HT-PEM) を導入します. 新しいPOSS-クロスリンクされた膜は,高度なエネルギーアプリケーションのための強化された酸化安定性と高プロトン伝導性を示しています.
科学分野:
- 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
- ポリマー化学のポリマー化学について
背景:
- 高温プロトン交換膜 (HT-PEM) は,高温燃料電池に不可欠ですが,リン酸浸出と酸化分解に苦しんでいます.
- ポリ ((4,4'-ジフェニルエーテル-5,5'-ビベンジミダゾール) (OPBI) は有望なマトリックス材料ですが,その性能は改善する必要があります.
研究 の 目的:
- 酸化安定性と陽子伝導性が向上した新しいHT-PEMを開発する.
- 機能化された多面性オリゴメリックシルセキオキサン (POSS) をOPBIマトリックスに組み込む効果を調査する.
- 燃料電池アプリケーションのHT-PEMの長期的な性能と耐久性を向上させるため.
主な方法:
- 機能化されたPOSSクロスリンカー (OE-POSSとPOSS-S-E) の合成は,硫黄ヒドリル基とアルリルグリシジルエーテルを含む反応を介して行われます.
- エポキシアミン結合を用いたクロスリンクされたOPBI膜 (OPBI-OE-POSSとOPBI-POSS-S-E) の製造.
- フェントンの反応剤を用いた酸化安定性の評価と,高温で陽子の伝導率の測定.
主要な成果:
- OPBI-POSS-S-E膜は優れた酸化安定性を示し,80°Cのフェントンの試薬で108時間経過した後,重量の79.4%を保持しました.
- サルフヒドリル基を保持したPOSS-S-Eクロスリンクは,フリーラジカルを駆除し,膜の耐久性を高めました.
- PAドーピングされたOPBI-POSS-S-E-20%膜は,160°Cで50.8mS cm-1の陽子伝導率を達成しました.
- 膜電極組立は,ピーク電力密度724mWcm−2を示した.
結論:
- 機能化されたPOSSは,HT-PEMのパフォーマンスを向上させるための効果的なナノ変形剤として機能します.
- 開発されたOPBI-POSS-S-E膜は,耐久的で効率的な高温燃料電池のための有望なソリューションを提供します.
- POSSの組み込みは,OPBIベースのHT-PEMの酸化安定性と陽子伝導性を大幅に改善します.
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