🔋 Endogenous Functional Group Engineering Enables High‐Efficiency Hard Carbon Anodes for Sodium‐ion Batteries

📝 مهندسی گروه‌های عاملی درون‌زا در پیش‌ماده کربن سخت، شیمی SEI و عملکرد آند باتری یون-سدیم را با بازدهی کولمبی اولیه ۸۷.۹٪ بهبود می‌دهد.

📚 Journal: Small #Small
📅 Date: 2026-10-06
🔬 Research Article

💡 Novelty & Significance:
This work pioneers molecular precursor engineering to tune endogenous functional groups in hard carbon anodes, directly controlling SEI chemistry. It reveals that ‐COOH groups yield a thin NaF-rich SEI, enabling 87.9% initial Coulombic efficiency and 95.7% capacity retention after 200 cycles. This provides a generalizable design principle linking precursor chemistry to interfacial control for high-performance sodium-ion batteries.

🔗 10.1002/smll.76134

🏷 hard carbon anode · sodium-ion battery · solid electrolyte interphase · functional groups · initial Coulombic efficiency