混合イオンFeOF電極の構造的および化学的変化に関する包括的な洞察は,PDFとNMRスペクトロスコピーのオペラントを用いて行われます
Kamila M Wiaderek1, Olaf J Borkiewicz, Elizabeth Castillo-Martínez
1X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Journal of the American Chemical Society
|February 26, 2013
まとめ
高性能鉄酸化フッ化物電極は,可逆的な電気化学反応機構を明らかにしています. サイクリングは,鉄が好ましくフッ素に富んだ環境で反応するナノ複合物構造を形成します.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- 固体化学 固体化学
背景:
- 鉄酸化フッ素は,エネルギー貯蔵アプリケーションの有望な高性能電極材料です.
- 電気化学反応機構を理解することは,性能と安定性を最適化するために不可欠です.
研究 の 目的:
- 鉄酸化フッ化物電極の詳細な電気化学反応機構を解明する.
- サイクル中の電極材料の構造的進化を調査する.
主な方法:
- オペランドX線ペア分布関数 (PDF) 解析.
- リチウム核磁気共振 (Li NMR) スペクトロスコーピー. リチウム核磁気共振 (Li NMR) スペクトロスコーピー.
- 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析. 債券価値総和 (BVS) 分析.
主要な成果:
- 電気化学反応は可逆であり,充電時に完全放電能力が回復します.
- 電子サイクリングの結果,無形ルチルとナノスケール岩塩の相からなるナノ複合構造が生じる.
- アニオン分割が発生し,Fが豊富なルチルとOが豊富な岩塩の相を形成し,Fが豊富な環境で鉄が好ましく反応する.
結論:
- サイクリング誘発ナノ複合材料構造は,鉄酸化フッ化物電極の電気化学的振る舞いを決定する.
- フッ素とOが豊富な環境における鉄の好ましい反応によって導かれるFとOが豊富な相の連続反応が,全体的なメカニズムを支配している.
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