セレニウムとセレニウム硫黄をポジティブ電極として使用したリチウム・ナトリウム充電電池の新型
Ali Abouimrane1, Damien Dambournet, Karena W Chapman
1Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States. Abouimrane@anl.gov
Journal of the American Chemical Society
|February 28, 2012
まとめ
新しいセレニウムとセレニウム硫黄のカトドは,リチウムとナトリウム電池の高性能を提供します. これらの材料は,調節可能な性質と高電圧サイクリングを提供し,電気自動車とスマートグリッドのエネルギー貯蔵を促進します.
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
- エネルギー貯蔵 エネルギー貯蔵
背景:
- リチウムイオン電池とナトリウムイオン電池は,現代のエネルギー貯蔵に不可欠です.
- 高容量で安定したカトド材料の開発は,依然として重要な課題です.
- 既存の硫黄ベースのカトドは,安定性と導電性に関する問題に直面しています.
研究 の 目的:
- 新しいセレニウムとセレニウム硫黄 (Se(x) S(y)) カトド材料を導入する.
- これらの電極にリチウム (Li) とナトリウム (Na) を挿入する構造的メカニズムを調査する.
- これらの新しい材料の電気化学的性能とエネルギー貯蔵アプリケーションの可能性を評価する.
主な方法:
- セレニウムとセレニウム硫黄カトド材料の合成と特徴付け.
- LiとNaの挿入/抽出の電気化学的試験.
- 構造的メカニズムを理解するためのペア分布関数 (PDF) 分析.
主要な成果:
- セレニウム (Se) 電極は,LiとNaの両方のアノドで有望な電気化学性能を示しています.
- 混合Se(x) S(y) システムは,調節可能な電極特性,バランス能力,伝導性を提供します.
- SeおよびSe(x) S(y) 電極は,高電圧 (最大4.6V) で安定したサイクリングを示します.
- これらの材料は,硫黄ベースのバッテリーと比較して,より高い体積エネルギー密度を達成します.
結論:
- セレニウムとセレニウム-硫黄化合物は,先進電池のための新しいクラスの可動性のあるカトド材料を表しています.
- Se(x) S(y) の調節可能な性質は,電極性能の最適化を可能にします.
- 高圧の安定性とエネルギー密度は,これらの材料を電気自動車とグリッドストレージに有望にしています.
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