中温燃料電池用,酸素と陽子を輸送するオープンフレームイオノマー
Jianwei Yang1, Hengyu Xu2, Jie Li1
1Key Laboratory of Cluster Science, Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Frontiers Science Center for High Energy Material, Advanced Technology Research Institute (Jinan), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
Science (New York, N.Y.)
|September 5, 2024
まとめ
新しい共性有機フレームワーク (COF) イオノマーは,水保持と陽子伝導性を改善することによって,中温陽子交換膜燃料電池 (MT PEMFC) を強化します. これは高温下での電力密度と性能を高めます.
科学分野:
- 電気化学
- 材料科学
- 化学工学
背景:
- 中温プロトン交換膜燃料電池 (MT PEMFC) は,低温の同位体よりも利点がありますが,100°C~120°Cでイオノマー脱水およびガス輸送の問題があります.
- 陽子伝導に不可欠なナフィオンイオノマーは 高温で脱水し 燃料電池の効率を制限します
研究 の 目的:
- MT PEMFCで水保持と陽子の伝導性を改善する新しいイオノマーを開発する.
- 高温で動作するMT PEMFCにおけるガス輸送の制限を克服する.
- バイオインスパイアされたアプローチを使用してMT PEMFCのパフォーマンスを向上させる.
主な方法:
- 合成されたα-アミノケトン結合の共性有機枠 (COF) イオノマー.
- COFイオノマーをナフィオンで織り込み,複合膜を作ります.
- H2と空気燃料で105°CでCOF-Nafion膜を組み込んだMT PEMFCの性能をテストした.
- 陽子と酸素を運ぶ性質を評価した.
主要な成果:
- オスモライトにインスパイアされたCOFイオノマーは,水分を保持するシネージ的水素結合を活用して"呼吸可能な"陽子伝導体として作用します.
- 酸素輸送抵抗の減少とともに,加強された水分と陽子輸送が観察されました.
- COF- Nafionを投与したMT PEMFCは,最大功率密度18. 1W/ mgPt,定格功率密度9. 5W/ mgPtを達成し,対照細胞と比較して有意な増加 (101%と187%) を示した.
結論:
- 開発されたCOFイオノマーは,MT PEMFCにおける水管理とガス輸送の課題を効果的に解決しています.
- この新しい材料は燃料電池の性能を大幅に向上させ,高温燃料電池技術の進歩のための有望な戦略を示しています.
- バイオインスパイアされたデザインにより 耐久性があり効率的な 陽子交換膜燃料電池が作られるのです
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