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固体無機配合ポリマーのユニークな陽子輸送経路は,本質的に高い持続的な無水質陽子伝導性につながります.

  • 0State Key Laboratory of Radiation Medicine and Protection, School for Radiological and interdisciplinary Sciences (RAD-X) and Collaborative Innovation Centre of Radiation Medicine of Jiangsu Higher Education Institutions , Soochow University , Suzhou 215123 , China.
Journal of the American Chemical Society +

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2018年4月26日

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2018年4月26日

PubMedで要約を見る

まとめ

この要約は機械生成です。

新しいジルコニウム・フォスファート・コーディネーション・ポリマー (CP) は,中間温度燃料電池のための高無水質陽子伝導性を示す. この材料は 効率的な陽子輸送を可能にし 持続的な発電の可能性を示しています

科学分野

  • 材料科学
  • 電気化学
  • 固体化学

背景

  • 中温燃料電池のための安定した高性能プロトン伝導体の開発は,実用的なアプリケーションにとって極めて重要です.
  • 既存のコーディネーションポリマー (CP) /メタル・オーガニック・フレーム (MOF) 材料は,無水質プロトンの伝導性と安定性に問題があります.

研究 の 目的

  • 中間温度燃料電池用の新型陽子伝導協調ポリマー (NH4) 3[Zr(H2/3PO4) 3 (ZrP) を導入する.
  • 陽子輸送機構を調査し,電解質としての材料の性能を評価する.

主な方法

  • 構造分析のためのX線結晶学と中性子粉の difraktion.
  • 陽子のダイナミクスを研究するための変温固体NMRスペクトロスコーピー.
  • プロトンの輸送経路を視覚化するための第一原理と量子分子動力学のシミュレーション.
  • 性能評価のためにZrPをH2/O2と直接メタノール燃料電池に組み込む.

主要な成果

  • ZrPは180°Cで1.45 × 10−3 S·cm−1の安定した無水質陽子の伝導性を表している.
  • 陽子輸送は,NH4+とリン酸ペアの間の効率的な交換によって,水素結合鎖の中で起こります.
  • ZrPで組み立てられた燃料電池は180 °Cで12 mW·cm-2の電力密度を達成し,15時間以上安定した動作を示した.

結論

  • ZrPは,中間温度燃料電池のための有望な無水質陽子導体です.
  • 独特の陽子輸送メカニズムは 先進的な陽子伝導材料の設計に 新しい経路を提供します
  • H2 / O2と直接メタノール燃料電池の両方で実証された実用化は,持続的な発電の可能性を強調しています.

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