超高秩序のメソポラスV群の移行金属酸化物で,アイソ指向の層状ナノ結晶ドメインで,充電貯蔵に対する擬似容量的な貢献
Kirstin Brezesinski1, John Wang, Jan Haetge
1Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany.
Journal of the American Chemical Society
|May 4, 2010
まとめ
高度にオーダーされたメソポラス型移行金属酸化物フィルムは,ブロックコポリマーを使用して合成されました. これらの材料は,エネルギー貯蔵アプリケーションのための優れた電気化学的性質を示しています.
科学分野:
- マテリアルサイエンス 材料科学
- ナノテクノロジー ナノテクノロジー
- 電気化学 電気化学について
背景:
- アンフィフィリックブロックコポリマーは,周期的な無機ナノ構造物を作成するための効果的なテンプレートとして機能します.
- 制御された結晶学的な方向性を有するオーダーメイドメソポラス材料の開発は,高度なアプリケーションにとって極めて重要です.
研究 の 目的:
- 高度オーダーされたメソポラスタンタール・ニオビウム酸化物 (TaNbO5),ニオビウム酸化物 (Nb2O5),タンタール酸化物 (Ta2O5) の薄膜を合成し,特徴づけること.
- これらの新型メソポラス材料の電気化学的特性,特に擬似容量性電荷貯蔵を調査する.
主な方法:
- 非有機ソルゲル前駆体とポリエチレン・コ・ブチレン・b・ポリエチレン・オキシド・ディブロック・コポリマー (KLE) の共同組み立て.
- 結晶化を誘導し,オーダーされた立方孔型固体構造を形成するための熱処理.
- 様々な基板における結晶学的配列とメソポラス構造の特徴化.
主要な成果:
- オーダーされた立方孔固体構造を持つ高結晶性メソポラスT-Nb2O5,L-Ta2O5,TaNbO5の薄膜を成功裏に製造しました.
- 多様な基板で高い結晶学的な配列を達成し,従来の表表層性の限界を克服しました.
- メソポラスNb2O5膜は,無形同類と比較して,著しく強化された擬似容量性電荷貯蔵を示した.
結論:
- この合成法により,調節性特性を有する指向性メソポラス型移行金属酸化物の生成が可能である.
- メソポロシティと結晶学的な指向のユニークな組み合わせは,電気化学的性能,特にインターカレーションの擬似電容性を大幅に高めます.
- これらの材料は,高性能エネルギー貯蔵装置の実現に期待されています.
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