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Metastable sodium closo-hydridoborates for all-solid-state batteries with thick cathodes
用於厚正極全固態電池的亞穩態鈉閉合氫硼酸鹽


Jin An Sam Oh, Zihan Yu, Chen-Jui Huang, Phillip Ridley, Alex Liu, Tianren Zhang, Bing Joe Hwang, Kent J. Griffith*, Shyue Ping Ong*, Ying Shirley Meng*
https://doi.org/10.1016/j.joule.2025.102130
SEED Member: Bing Joe Hwang

 

Major Contributions
 

1.Kinetic stabilization of the orthorhombic Na₃(B₁₂H₁₂)(BH₄) phase enables superionic Na⁺ conductivity (4.6 mS cm⁻¹ at 30°C) with excellent electrochemical stability. 

2.Integration with chloride-coated cathodes allows thick, high-areal-loading composite cathodes that maintain performance down to subzero temperatures. 

3.Computational and experimental insights reveal that anion-framework mobility enhances Na⁺ transport, providing a transferable design strategy for high-performing solid electrolytes.




主要貢獻
 

1.正交晶系 Na₃(B₁₂H₁₂)(BH₄) 相的動力學穩定化 實現了超離子的 Na⁺ 導電率(30°C 時為 4.6 mS cm⁻¹),並具有優異的電化學穩定性。
 
2.與氯化物包覆正極的整合,實現了具備高面負載(high-areal-loading)的厚複合正極,並能在零下低溫環境中保持性能。
 
3.計算與實驗結果顯示,陰離子骨架的活動性增強了 Na⁺ 的傳輸,為高性能固態電解質提供了可推廣的設計策略。