超高オスモティックエネルギー変換のための1つのポルフィリン連鎖のセルフ・アセンブリドヘリカルイオン交換チャネル
Chao Li1,2, Heming Jiang3, Pengxiang Liu1
1Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P. R. China.
Journal of the American Chemical Society
|May 20, 2022
まとめ
導電性-選択性のトレードオフを克服する 新しいイオン交換膜 (IEM) が開発されました この新しい膜は 効率的なオスモティックエネルギー変換のために 超高電力密度を達成します
科学分野:
- 材料科学
- 電気化学
- ポリマー科学
背景:
- イオン交換膜 (IEM) は,反逆電透析 (RED) システムでオスモティックエネルギーを電気に変換するために不可欠です.
- エネルギー変換効率を向上させるには,高い選択性およびイオン伝導性を有するIEMが必要です.
- 重要な課題は,伝導性と永久選択性の間のトレードオフであり,しばしば膜の腫れによるものです.
研究 の 目的:
- イオン交換膜の設計と製造は 永久選択性-伝導性のトレードオフを克服します
- 導電性と選択性の両方を強化することによって,オスモティックエネルギー変換の高性能を達成する.
- 次世代のIEMのための簡単で経済的な戦略を開発する.
主な方法:
- ポルフィリンコア4つ星ブロック共ポリマー (p-BCP) を使用した膜の製造.
- ブロックコポリマーの自己組み立てとポルフィリン π-π スタッキングのシネジスティック効果を利用して,高密度の螺旋状のポルフィリンチャネルを作成します.
- イオン交換能力,永久選択性,イオン伝導性を含む膜特性.
主要な成果:
- 異常に低いイオン交換能力 (∼10−2 mequiv g−1) を有する膜が実証された.
- 50倍濃度比で超高電力密度19.3Wm−2を達成した.
- ポルフィリンチャネルは高塩化物の選択性と伝導性を示し,効率的なオスモティックエネルギー変換に不可欠である.
結論:
- 開発されたp-BCP膜は,有効な選択性-伝導性のトレードオフを破る.
- この新しい膜の設計は,高性能のオスモティックエネルギー変換のための有望なアプローチを提供します.
- この戦略は新しい世代の 効率的なイオン交換膜の道を開きます
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