🔋 Voltage Hysteresis Induced by Fragile Quasi‐Flat Bands in Oxygen‐Redox Cathodes

📝 چارچوب شبه‌باند تخت نشان می‌دهد که حساسیت حالت‌های اکسیژن 2p به اغتشاشات، هیسترزیس ولتاژ در کاتدهای ردوکس اکسیژنی باتری لیتیومی را تشدید می‌کند.

📚 Journal: Advanced Materials #AdvancedMaterials
📅 Date: 2026-10-14
🔬 Research Article

💡 Novelty & Significance:
This work proposes a quasi-flat-band framework explaining voltage hysteresis in oxygen-redox cathodes: oxygen 2p states near the Fermi level are intrinsically perturbation-sensitive, so weak lattice distortions or thermal vibrations amplify band dispersion and hysteresis. It reframes mitigation beyond suppressing structural reconstructions toward controlling electronic instability, offering two design principles—stabilizing symmetry and engineering orbital hybridization—to enable efficient high-voltage oxygen-redox cathodes.

🔗 10.1002/adma.75396

🏷 oxygen-redox cathode · voltage hysteresis · quasi-flat bands · lithium battery · electronic instability