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Wadsley-Roth構造における電気化学的干渉に対する極端な欠陥耐性は,メタスタブルなNaNb7O18によって示される

Sarah L Ko1, Jordan A Dorrell2, Ethan D Alter1

  • 1Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States.

Journal of the American Chemical Society
|February 3, 2025
PubMed
まとめ

この研究では,構造上の不完全さにもかかわらず,迅速なリチウムイオン輸送と高容量サイクリングを可能にする,例外的な欠陥耐性を有する新しいバッテリー材料であるNaNb7O18を導入しました. リバーシブルなニオビウム-ニオビウム結合形成を含む新しい電荷貯蔵メカニズムを示しています.

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Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
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