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High energy density and micrometer-sized d0-free disordered rocksalt cathodes
高能量密度與微米級無 d⁰ 無序岩鹽正極


Wu, Vincent C., Erick A. Lawrence, Tianyu Li, Euan N. Bassey, Chia-Yu Chang, Bing Joe Hwang, Pierre-Etienne Cabelguen, and Raphaële J. Clément.
https://doi.org/10.1039/D5EE01564B
SEED Member: Bing Joe Hwang

 

Major Contributions
 

1.Developed a rapid microwave-assisted synthesis enabling d⁰-free DRX formation without redox-inactive stabilizers.  

2.Achieved high-capacity (220 mAh g⁻¹) and durable micrometer-sized Mn-based DRX cathodes without particle downsizing.  

3.Revealed that removing d⁰ species enhances δ-phase transformation, improving Li-ion transport and cycling stability.




主要貢獻
 

1.快速微波輔助合成技術: 開發了一種快速合成法,無需使用氧化還原非活性穩定劑(redox-inactive stabilizers),即可生成無 d⁰ 的無序岩鹽(DRX)結構。

2.高性能微米級材料: 實現了高容量(220 mAh g⁻¹)且具耐久性的微米級錳基 DRX 正極,且無需進行顆粒微縮化(particle downsizing)處理。

3.機制揭示: 研究發現移除 d⁰ 物種能增強 δ 相(delta-phase)轉變,進而改善鋰離子傳輸與循環穩定性。