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エネルギー密度の高いリチウムイオン電池の急速充電
Chao-Yang Wang1,2, Teng Liu3, Xiao-Guang Yang3,4
1Electrochemical Engine Center (ECEC) and Department of Mechanical Engineering, Pennsylvania State University, University Park, PA, USA. cxw31@psu.edu.
Nature
|October 12, 2022
まとめ
高エネルギーリチウムイオン電池の急速充電は,非対称な温度調節を使用して可能になりました. この技術革新により 電気自動車のバッテリーのサイズが 低価格で持続可能になり 急速充電で 500万マイルを走れるようになりました
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- 高エネルギーリチウムイオン電池 (250-300 Wh kg−1) は電気自動車 (EV) に不可欠ですが,コストとリソースの制限により課題に直面しています.
- 急速充電はEVの採用に不可欠ですが,エネルギー密度の高い電池の寿命を損なうことなく充電することは困難です.
- 現在のEVバッテリー技術は,十分な範囲を確保するために大きなパックの必要性によって制限され,価格と持続可能性に影響します.
研究 の 目的:
- エネルギー密度の高いリチウムイオン電池の高速充電ソリューションの開発
- 電気自動車のバッテリーの容量を 急速充電機能で縮小する
- バッテリーの安定性と安全性を保証します.
主な方法:
- 非対称な温度調節を用いた材料アグノスティックなアプローチを実装した.
- 熱的に安定した二重塩の電解質を使用した.
- バッテリーパックの冷却と安全性をシミュレートする デジタルツインを開発しました
主要な成果:
- 265 Wh kg−1 のバッテリーで 12 分で 75% の充電状態 (11 分で 70%) を達成しました.
- 900 (または 2,000) 以上のサイクルが実証され,一貫した高速充電で半百万マイルの範囲に相当します.
- 熱調節4C充電は空気コンベクションのみを必要とし,安全性を確保し,コンパクトなセルからパックへの設計を可能にします.
結論:
- 安定した電解質と組み合わせた非対称な温度調節は,高エネルギーバッテリーの急速な充電を促進します.
- この方法は,EVのバッテリーサイズを縮小し,リーズナビリティと持続可能性を向上させ,距離を心配することなくサポートします.
- このアプローチは,シリコンとリチウム金属アノドを含む次世代のバッテリー材料の大きな可能性を示している.
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