🔋 Interface and Substrate Design Enhance the Stability of Sodium Metal Anodes

📝 طراحی SEI و اصلاح جمع‌کننده جریان با کربن سخت، پایداری آند فلز سدیم را در باتری بدون آند با الکترولیت ژلی بهبود می‌دهد.

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

💡 Novelty & Significance:
This work uniquely combines SnF₂-initiated THF polymerization, forming a fluoride/NaₓSnᵧ-rich SEI, with a micron-sized hard carbon current collector. This dual strategy yields a high Na⁺ transference number (0.88), a 4.5 V window, and 1700 h symmetric-cell cycling. The resulting anode-less sodium battery retains 80% capacity after 180 cycles at room temperature and 84% after 200 cycles at −10°C, advancing practical sodium metal batteries.

🔗 10.1002/smll.76113

🏷 sodium metal anode · solid electrolyte interphase · hard carbon · gel electrolyte · anode-less battery