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Updated: Jan 31, 2026

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リチウム金属および固体電解質界面におけるボイド形成と進化ダイナミクス
Sourim Banerjee1, Bairav S Vishnugopi1, Aditya Singla1
1School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
ACS applied materials & interfaces
|January 30, 2026
まとめ
本研究は、固体電池におけるボイド形成に温度と表面の特徴がどのように影響するかを明らかにする。これらの要因を理解することは、より安全で高エネルギーな電池のための安定したリチウム金属界面を設計する上で重要である。
科学分野:
- 材料科学
- 電気化学
- エネルギー貯蔵
背景:
- リチウム(Li)金属アノードを備えた固体電池(SSB)は、より高いエネルギー密度と安全性を約束する。
- Li固体電解質(SE)界面でのボイド形成は、SSBの性能を妨げる主要な課題である。
研究 の 目的:
- Li-SE界面における電気溶解速度論と空孔拡散との間のメカニズム的な相互作用を調査する。
- Liストリッピング中のボイド進化と界面安定性に温度と表面の不均一性がどのように影響するかを決定する。
主な方法:
- Liストリッピング中の界面プロセスのメカニズム的調査。
- Li拡散速度論と接触安定性に対する温度効果の分析。
- 局所的な反応および輸送速度に対する表面の不均一性(結晶粒界など)の評価。
主要な成果:
- 非均一なストリッピングダイナミクスによって支配される明確な界面安定性レジームを特定した。
- 温度はLi拡散を促進し、安定した接触を促進することを示した。
- 表面の不均一性は、反応と輸送の空間的変動を作り出すことによって、ピット形成を加速することを示した。
結論:
- ボイド進化は、界面速度論、動作条件、および表面の不均一性の連成した影響によって決定される。
- メカニズム的な洞察は、SSBにおける安定した固体-固体界面を設計するための戦略を導く。
- 温度の最適化と表面の特徴の管理は、固体電池における安定したLi金属アノードにとって重要である。
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