🔋 Vacancy‐Mediated Sulfur Exchange Between Catalysts and Polysulfides Accelerates Sulfur Redox Kinetics in Lithium‐Sulfur Batteries
📝 مکانیسم تبادل گوگرد با واسطه جای خالی در Bi2S3، سینتیک ردوکس گوگرد را در باتری لیتیوم-گوگرد تسریع کرده و به چگالی انرژی بالا در پاکت سل میرسد.
📚 Journal: Advanced Materials #AdvancedMaterials
📅 Date: 2026-10-04
🔬 Research Article
💡 Novelty & Significance:
Vacancy-mediated sulfur exchange is identified as a new mechanism accelerating sulfur redox in Li–S batteries. Using ³⁴S labeling on Bi₂S₃, sulfur vacancies act as exchange centers enabling lattice incorporation and reconstruction. Vacancy density directly correlates with exchange extent and catalysis; it doubles interfacial area and lowers the Li₂S barrier from 0.352 to 0.179 eV, enabling a 504 Wh kg⁻¹ pouch cell.
🔗 10.1002/adma.75210
🏷 lithium-sulfur battery · sulfur vacancy · sulfur exchange · Bi2S3 catalyst · polysulfide conversion
Post #14813
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