非伝統的な,安全で,高電圧の充電可能な電池
Maria Helena Braga1,2, Chandrasekar M Subramaniyam1, Andrew J Murchison1
1Materials Science and Engineering Program and Texas Materials Institute , The University of Texas at Austin , Austin , Texas 78712 , United States.
Journal of the American Chemical Society
|April 25, 2018
まとめ
この研究では,室温で完全に固体状態の充電可能なバッテリーと新しいタンデム電解質を提示しています. 優れたサイクル寿命と容量の増加により,エネルギー貯蔵の安全な高速充電の代替手段となる.
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- 安全で高性能な固体電池の開発は 次世代のエネルギー貯蔵に不可欠です
- 既存のリチウムイオン電池技術は,サイクル寿命,安全性,エネルギー密度の制限に直面しています.
- 固体電解質は潜在的な利点がありますが,効率的なイオン輸送と安定性のために革新的な設計が必要です.
研究 の 目的:
- 室温で充電可能な固体電池と タンデム電解質の研究です
- サイクル寿命,容量保持,充電/放電特性を含む電気化学性能を評価する.
- バッテリー操作中のタンデム電解質における電気二極の役割を理解する.
主な方法:
- リチウムアノド,リチウム+ガラス電解質,可塑剤,酸化主体カトドを備えた全固体電池の製造.
- 電気化学試験は,様々な速度と電圧の切断でガルバノスタティック充電/放電サイクルを含む.
- サイクル中に生成される内部電場の下での電解質の行動とイオン輸送機構の分析.
主要な成果:
- 5Vのカットオフで153mA·g−1で23,000回以上の充電/放電サイクルを達成した.
- 329サイクルで増加した585mAh·g−1の容量を示した.
- 放電電圧が4.5~3.7Vで316サイクルで安定した動作を観測した.
結論:
- Li+ガラスと可塑剤を備えたタンドム電解質は,高電圧の動作と例外的なサイクル寿命を可能にします.
- 電解質内の電気二極は,内部電気場を維持し,性能と容量を向上させます.
- バッテリーの設計は安全で高速充電のソリューションであり,従来の方法よりもエネルギー貯蔵能力を向上させる可能性があります.
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