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室温超プロトン伝導度10−1 S cm−1 を超えるコーディネーションポリマー
Shyam Chand Pal1, Debolina Mukherjee1, Yasaswini Oruganti2
1Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.
Journal of the American Chemical Society
|May 15, 2024
まとめ
2つの新しい結晶型固体プロトン導体 (SSPC) が水駆動アプローチを使用して合成されました. PCM-2は室温で超高伝導性を示し,商用材料を上回ります.
科学分野:
- 材料科学
- 化学について
- エネルギー貯蔵
背景:
- 効率的な結晶固体プロトン伝導体 (SSPC) はクリーンエネルギーアプリケーションに不可欠です.
- 室温で高伝導率 (≥10−1 S cm−1) を達成することは,重要な課題です.
研究 の 目的:
- SSPCとして新しい1D Co ((II) コーディネーションポリマー (CP) を設計し,合成する.
- 陽子伝導機構に対する水とオクソアニオンの作用を調査する.
主な方法:
- PCM-2とPCM-3という2つの1D Co ((II) コーディネーションポリマーの合理的な合成
- 異なる湿度および温度下での構造と陽子伝導性の特徴.
主要な成果:
- PCM-2は,商用ナフィオン117を上回る超高プロトン伝導性 (25°C,RH95%) を示した.
- PCM-2の陽子伝導性が強化されたのは,金属結合水と窒素アニオン間の協力的なH結合によるものである.
- このH結合が欠けていたPCM-3は,有意に低い伝導性を示した (85 °C,95%RHで5.87 × 10−5 S cm−1).
結論:
- PCM-2は,環境温度で10−1 S cm−1の伝導性を達成した最初のSSPCであり,優れた再利用性があります.
- 高性能SSPCの設計には,特定のH結合によって強化された,調整された水駆動型陽子伝導機構が有効である.
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