リチウムイソプロオキシドを添加した固体リチウム電解質を,開いた金属部位を持つ金属有機骨組みに添加する
Brian M Wiers1, Maw-Lin Foo, Nitash P Balsara
1Department of Chemistry, University of California, Berkeley, California 94720, USA.
Journal of the American Chemical Society
|September 1, 2011
まとめ
新しい固体リチウム電解質,Mg{2}{dobdc) ·0.35LiO{i) Pr·0.25LiBF{4}·EC·DECが合成されました. この材料は,固体リチウム電池の有望なイオン伝導性を示しています.
科学分野:
- マテリアルサイエンス 材料科学
- 電気化学 電気化学について
- 固体化学 固体化学
背景:
- 固体電解質の開発は,先進的なリチウム電池にとって極めて重要です.
- メタル・オーガニック・フレームワーク (MOF) は,イオン輸送のための調整可能な構造を提供します.
- 既存の固体電解質は,導電性と安定性の課題に直面しています.
研究 の 目的:
- Mg (((2) (((dobdc)) を基にした新しい固体リチウム電解質を合成し,特徴づけること.
- 新しい材料のイオン伝導性と輸送特性を評価する.
- 固体電解質内の伝導機構を調査するために.
主な方法:
- Mgの合成 ((2) (((dobdc) ·0.35LiO ((i) Pr·0.25LiBF ((4) ·EC·DECの合成は,LiO ((i) Prの吸収と浸透によって行われます.
- 導電性測定のための2点ACインピデンススペクトロスコーピー.
- 輸送を研究するために,変数温度測定と単粒子分析を行います.
主要な成果:
- 合成された材料は,300 Kで3.1 × 10(-4) S/cmの伝導性を示しています.
- 低アクティベーションエネルギー (0.15 eV) は,効率的なイオン移動性を示す.
- 粒子内輸送は,支配的な伝導機構として特定されています.
結論:
- 新しく開発されたMg(2)(dobdc) 基の固体電解質は,リチウム電池の応用において大きな可能性を秘めている.
- 材料の性質は,効率的なリチウムイオン伝導性を示唆しています.
- 粒子内輸送を理解することは,将来の固体電解質設計を最適化するための鍵です.
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