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超高速に充電可能なアルミニウムイオン電池です
Meng-Chang Lin1, Ming Gong2, Bingan Lu3
11] Department of Chemistry, Stanford University, Stanford, California 94305, USA [2] Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan.
Nature
|April 8, 2015
まとめ
この研究では,グラフィット泡のカソードを使用して高性能の充電性アルミニウム電池を導入しています. 新しいバッテリーは,安定した2ボルトの放電高台,高速充電,そしてエネルギー貯蔵アプリケーションの例外的なサイクルライフを提供します.
科学分野:
- 電気化学 電気化学について
- マテリアルサイエンス 材料科学
- エネルギー貯蔵 エネルギー貯蔵
背景:
- 再充電アルミニウム電池は,低コストと安全性を約束しますが,カソド分解や低電圧などの課題に直面しています.
- 以前の研究は,低サイクル寿命と容量低下に悩まされ,実用的な応用が妨げられました.
研究 の 目的:
- 以前のシステムの限界を克服した,高速充電性アルミニウム電池を開発する.
- エネルギー貯蔵性能を向上させるための新しいアルミニウム・グラファイトシステムを調査する.
主な方法:
- アルミニウム金属アノドと3次元グラフィット泡のカトドを使用した.
- バッテリーの動作に不燃イオン液体電解質を使用した.
- 石墨におけるアルミニウムとアニオンインターカレーションの電気化学的堆積/溶解を調査した.
主要な成果:
- 2ボルト近くの安定した放電電圧高原を達成しました.
- 特定の容量は約70 mAh g−1で,98%のクーロンビック効率を示した.
- 約1分 (~4,000 mA g−1) の急速充電と,容量低下なしの7,500回以上のサイクルが報告されています.
結論:
- 開発されたアルミニウム・グラファイト電池システムは,高速度の能力と長いサイクル寿命を提供します.
- グラフィット泡のカトドは,急速なアニオン拡散を促進し,急速な充電を可能にします.
- このブレークスルーは,先進的なエネルギー貯蔵ソリューションの実行可能な代替案を提示しています.
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