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🔋 V─O─Ti Bridge‐Bond Polarity Boosts Na + Migration in V‐Based Fluorophosphates for Fast Sodium Storage

📝 دوپینگ Ti4+ در کاتد فلوروفسفات وانادیومی با ایجاد پیوند پلی V─O─Ti، قطبیت و انتقال Na+ را بهبود می‌بخشد و ظرفیت و پایداری بالایی در باتری سدیم-یون فراهم می‌کند.

📚 Journal: Angewandte Chemie International Edition #AngewandteChemie
📅 Date: 2026-10-10
🔬 Research Article

💡 Novelty & Significance:
Ti4+ doping in V-based fluorophosphates creates polar V─O─Ti bridge bonds that reshape V electronic structure, enhancing V─O electron exchange and expanding Na+ transport channels. This suppresses high-voltage polarization and boosts Na+ migration, enabling 121.8 mAh g−1 at 0.1C and 62.1 mAh g−1 at 50C, with 154 Wh kg−1 at 9 Ah pouch-cell scale—advancing fast-charging, high-power sodium-ion batteries.

🔗 10.1002/anie.6142534

🏷 sodium-ion battery · fluorophosphate cathode · Ti doping · Na+ migration · bridge-bond polarity
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