Nonflammable Polyfluorides‐Anchored Quasi‐Solid Electrolytes by Chemical‐Crosslinking for High‐Safety Sodium Metal Battery DOI
Shun Wang, Xing Lü, Tongyu Zhang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Abstract The combustion risks of flammable organic solvents and polymer matrices in liquid electrolyte systems, coupled with critical challenges such as inadequate ionic conductivity at room temperature (RT) poor sodium dendrite suppression capability, significantly hinder the practical application metal batteries (SMBs). Therefore, developing flame‐retardant or non‐combustible systems represents a pathway to overcome their safety limitations. To address these challenges, this study develops fluorinated membrane (PCUF), which integrates salt loading, enhanced ion dissociation, flame retardancy functions, is compatible high‐safety battery systems. presence electron‐withdrawing fluorine atom enhances dissociation lithium/sodium perchlorate promotes efficient transport. PCUF exhibits remarkable ( σ Na ⁺ = 2.590 × 10⁻⁴ S cm⁻¹, Li 2.413 10 ‐ ⁴ cm ¹) transference numbers t 0.910, 0.804). Na|PCUF|Na₃V₂ (PO₄) ₃ robust specific capacity 81.3 mAh g⁻¹ after 2000 cycles 1 C maintains stable performance over wide range (> 400 from 25 85 °C. Meanwhile, assembled demonstrates excellent cycling stability 4000 charge–discharge rate 0.5 C. Furthermore, thermal runaway testing reveals that both higher onset compared PCU membrane. This improvement stems fluorine‐containing free radicals (F·) generated during PCUF's decomposition, effectively suppress migration highly reactive chain reactions into gas phase. work highlights rational design strategy for constructing SEI enhancing safe long‐life sodium‐metal applications.

Язык: Английский

Nonflammable Polyfluorides‐Anchored Quasi‐Solid Electrolytes by Chemical‐Crosslinking for High‐Safety Sodium Metal Battery DOI
Shun Wang, Xing Lü, Tongyu Zhang

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Abstract The combustion risks of flammable organic solvents and polymer matrices in liquid electrolyte systems, coupled with critical challenges such as inadequate ionic conductivity at room temperature (RT) poor sodium dendrite suppression capability, significantly hinder the practical application metal batteries (SMBs). Therefore, developing flame‐retardant or non‐combustible systems represents a pathway to overcome their safety limitations. To address these challenges, this study develops fluorinated membrane (PCUF), which integrates salt loading, enhanced ion dissociation, flame retardancy functions, is compatible high‐safety battery systems. presence electron‐withdrawing fluorine atom enhances dissociation lithium/sodium perchlorate promotes efficient transport. PCUF exhibits remarkable ( σ Na ⁺ = 2.590 × 10⁻⁴ S cm⁻¹, Li 2.413 10 ‐ ⁴ cm ¹) transference numbers t 0.910, 0.804). Na|PCUF|Na₃V₂ (PO₄) ₃ robust specific capacity 81.3 mAh g⁻¹ after 2000 cycles 1 C maintains stable performance over wide range (> 400 from 25 85 °C. Meanwhile, assembled demonstrates excellent cycling stability 4000 charge–discharge rate 0.5 C. Furthermore, thermal runaway testing reveals that both higher onset compared PCU membrane. This improvement stems fluorine‐containing free radicals (F·) generated during PCUF's decomposition, effectively suppress migration highly reactive chain reactions into gas phase. work highlights rational design strategy for constructing SEI enhancing safe long‐life sodium‐metal applications.

Язык: Английский

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