メタル・オーガニック・フレームワークにアニオンを酸化的に挿入するダブルイオン電池カソード
Michael L Aubrey1,2, Jeffrey R Long1,2
1Department of Chemistry, University of California , Berkeley, California 94720, United States.
Journal of the American Chemical Society
|October 6, 2015
まとめ
Fe2 ((dobpdc) という新しい酸化還元活性金属有機構造は,潜在的なバッテリー用途のための可逆性アニオン挿入を示しています. この枠組みは,先進的なエネルギー貯蔵装置の開発に希望を示しています.
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- メタル・オーガニック・フレームワーク (MOF) は,様々な用途で調節可能な特性を提供します.
- レドックス活性MOFは,電気化学的なエネルギー貯蔵に興味があります.
研究 の 目的:
- Fe2 ((dobpdc) MOFにおけるアニオン挿入反応を調査する.
- Fe2 ((dobpdc) の電池におけるカトド材料としての可能性を調査する.
主な方法:
- Fe2 ((dobpdc) の合成と特徴づけ
- 各種アニオンによるトポタクシー酸化挿入反応.
- サイクルボルトメトリーとガルバノスタティックサイクルを含む電気化学測定.
- デュアルイオン電池プロトタイプの製造と試験
主要な成果:
- Fe2 ((dobpdc) は,弱調整アニオンの可逆性,ステキオメトリック酸化挿入を受けます.
- アニオン挿入は,アニオンサイズと溶媒に依存し,ナノコンフィネメントの影響を受けます.
- この材料は,50サイクル以上の高い初期還元可能性と安定性を表しています.
- Fe2 ((dobpdc) を使用したデュアルイオン電池のプロトタイプは,316 Wh/kgの特異エネルギーを達成した.
結論:
- Fe2 ((dobpdc) は,逆戻り可能なアニオン挿入により,ナトリウムイオン電池のための有望なカトド材料です.
- この研究は,MOFベースの電気化学システムにおけるアニオンサイズと溶媒効果の重要性を強調しています.
- この研究は,高性能のエネルギー貯蔵のための先進的なMOF材料の設計への道を開きます.
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