シメトリック・レドックス・フロー・バッテリーの双極性材料としてのブラッター・ラジカル

Jelte S Steen¹, Jules L Nuismer¹, Vytautas Eiva¹

¹Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

Journal of the American Chemical Society

|March 8, 2022

まとめ

安定した対称性のあるリドックスフロー電池を可能にしますこれらの化合物は高容量保持と効率的なエネルギー貯蔵の可能性を示し,クロスオーバーの問題が軽減されています.

科学分野:

電気化学
材料科学
有機化学

背景:

レドックス活性有機分子は,レドックス流電池 (RFB) の鍵です.
材料のクロスオーバーと分解は,全有機RFBの性能を制限する.
RFBの動作を改善するために,対称な電解質組成は望ましい.

研究の目的:

対称的なRFBの充電貯蔵材料としてブラッターラジカルを探求する.
水性環境におけるブラッターラジカルの安定性と電気化学的性質を評価する.
高性能で安定したRFBの潜在能力を調査する.

主な方法:

電気化学的行動を評価するサイクル電圧測定法.
化学合成と特徴付け (光譜,X線結晶学).
サイクルの安定性と容量保持のための静的なHセルとフローレジムのテスト.

主要な成果:

ブラッターラジカルはRFBの対称な電解質組成を可能にします.
水中でも反転可能な双極性電気化学を示す.
C(3) -CF3の置換剤を含む誘導体は,高い容量保持率 (7日/100サイクル) を示しています.
流量条件でのセル再均衡方法として実証された極性逆転.

結論:

ブラッターラジカルは,安定性と電気化学的特性により,対称的な有機RFBにとって有望である.
高容量保持と複数の充電状態での安定性は,RFBアプリケーションに適していることを示唆しています.
対称的な設計と極性逆転は,RFBの主要な制限に解決策を提供します.

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