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🔋 Interfacial Dipole Reorganization Enables Ultrafast Sodium Storage in Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 Cathodes

📝 جانشینی Ni2+ در کاتد Na4Fe3(PO4)2P2O7 ساختار الکترونی و پتانسیل الکترواستاتیک سطحی را بازآرایی کرده و ذخیره‌سازی سریع سدیم با حفظ ۷۴٪ ظرفیت پس از ۱۰۰۰۰ چرخه را ممکن می‌سازد.

📚 Journal: Advanced Energy Materials #AdvancedEnergyMaterials
📅 Date: 2026-10-15
🔬 Research Article

💡 Novelty & Significance:
Ni²⁺ substitution in Na₄Fe₃(PO₄)₂P₂O₇ couples bulk electronic regulation to interfacial dipole reorganization, reshaping surface potential and suppressing solvent polarization and ion pairing. This bulk-to-interface strategy yields ultrafast Na⁺ storage—118 mAh g⁻¹ at 0.1 C, 74% retention over 10,000 cycles at 20 C—extending substitution chemistry beyond bulk transport toward deliberate electrode–electrolyte interaction control.

🔗 10.1002/aenm.71711

🏷 sodium-ion battery · NFPP cathode · Ni substitution · interfacial dipole · ultrafast sodium storage
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