Major Contributions
 

1. LiH₂PO₄ wet impregnation converts surface residues (LiOH, Li₂CO₃) on single-crystal Ni-rich NMC into a uniform ~4 nm Li₃PO₄ protective coating, simultaneously eliminating harmful residues without solvent washing and forming a stable SEI-like interphase confirmed by in situ GC-MS and titration.

2. The Li₃PO₄ coating suppresses Ni migration, mitigates electrolyte-induced side reactions, and preserves Ni oxidation states over cycling, as confirmed by synchrotron XAS and post-mortem analysis.

3. Electrochemical testing shows 72.96% capacity retention after 100 cycles at 0.2C (vs. 18.25% for pristine SCNMC), along with improved rate capability and Li⁺ diffusion kinetics.

主要貢獻
 

1. LiH₂PO₄ 濕法浸漬將單晶鎳富 NMC 表面殘留物（LiOH、Li₂CO₃）轉化為均勻約 4 nm 的 Li₃PO₄ 保護塗層，無需溶劑洗滌即可同時消除有害殘留物並形成穩定界面，由原位 GC-MS 與滴定分析確認。

2. Li₃PO₄ 塗層抑制 Ni 遷移、減少電解液誘導的副反應並在循環過程中保持 Ni 氧化態，經同步輻射 XAS 與事後分析確認。

3. 電化學測試顯示在 0.2C 下 100 次循環後容量保持率為 72.96%（純 SCNMC 僅 18.25%），同時改善倍率性能與 Li⁺ 擴散動力學。