リチウムの2つのグラフェンシート間の反転可能な超密度の順序付け
Matthias Kühne1,2, Felix Börrnert3, Sven Fecher1
1Max Planck Institute for Solid State Research, Stuttgart, Germany.
Nature
|November 28, 2018
まとめ
研究者らは,リチウム原子が2層のグラフェンの中で超密度の相を形成し,予想される貯蔵能力を超えたことを観察しました. この発見は,高度なエネルギー貯蔵アプリケーションのための2D材料における新しいリチウム配列を明らかにします.
科学分野:
- 材料科学
- 電気化学
- ナノテクノロジー
背景:
- 炭素アロトロップは電気化学的エネルギー貯蔵に不可欠であり,リチウムの可逆吸収を可能にします.
- ホスト材料内のリチウムの配置を理解することは,実験上の限界のために困難です.
研究 の 目的:
- リチウムの二重層グラフェンの内部の配置を,可逆的なインターキャレーションで調べる.
- 立体材料でリチウム貯蔵する 新しいメカニズムを探求する
主な方法:
- 偏差修正による低電圧伝送電子顕微鏡
- 電子エネルギー損失スペクトロスコーピー
- 密度関数理論の計算
主要な成果:
- リチウム原子は2層のグラフェンシートの間に多層の密集した秩序を形成します.
- 観測されたリチウム貯蔵容量は,LiC6を大幅に上回る.
- 二層グラフェンの超密度の リチウム相を特定した
結論:
- リチウムを二次元材料で貯蔵する方法は,大量に貯蔵されるものと比べると異なっています.
- 二層グラフェンの超密度のリチウム相は,エネルギー貯蔵の強化の可能性を提供します.
- この研究は,層状のナノ材料におけるイオンインターケレーションの理解を進めています.
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