固体電解質としての有機頂点とポリオックスメタラートリンクの金属有機枠
Wentao Xu1, Xiaokun Pei1, Christian S Diercks1
1Department of Chemistry , University of California-Berkeley ; Materials Sciences Division, Lawrence Berkeley National Laboratory; and Kavli Energy NanoSciences Institute, Berkeley , California 94720 , United States.
Journal of the American Chemical Society
|October 24, 2019
まとめ
新しい金属有機フレームワーク (MOF),MOF-688は,優れたリチウムイオン伝導性と安定性を示しています. これは室温で動作する先進的なリチウム金属電池のための有望な固体電解質です.
科学分野:
- 材料科学
- 電気化学
- ナノテクノロジー
背景:
- メタル・オーガニック・フレームワーク (MOF) は,様々な用途の調整可能な構造を提供します.
- 固体電解質は安全で効率的な リチウム金属電池に不可欠です
- 安定した導電性固体電解質の開発は,バッテリー技術における重要な課題です.
研究 の 目的:
- 新しい3次元金属有機フレームワーク (MOF) を合成し,特徴づけること.
- リチウム金属電池の固体電解質としての合成MOFの可能性を調査する.
- MOFベースの電解質のイオン伝導性と電気化学的性能を評価する.
主な方法:
- ポリオキシメタラートとテトラキス ((4-ホルミルフェニル) メタンのイミン濃縮によるMOF-688の合成.
- シングルクリスタルX線 difraktionを使用して構造の決定.
- 原型リチウム金属電池のイオン伝導度測定と電気化学サイクル
主要な成果:
- MOF-688は,三重に交互に浸透したダイヤモンドベースの (ダイア) トポロジーを示しています.
- MOF-688のリチウムイオン交換は,高いイオン伝導性 (20 °Cで3.4 × 10−4 S cm−1) と高い伝導数 (t Li+ = 0.87) を生み出します.
- 固体電解質としてMOF-688を使用したプロトタイプ電池は,室温で安定したサイクルを証明し,実用的な電流密度は ~0.2 Cであった.
結論:
- MOF-688は安定し,非常に伝導性の高い固体電解質です.
- インターフェイス抵抗が低く,リチウム金属電池に適しています.
- このMOFは,エネルギー貯蔵のための固体電解質材料の重要な進歩を表しています.
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