Constructing Continuously-Distributed and Crystalline-NaF-Rich SEI on Hard Carbon Anode Through Binder Chemistry for High-Performance Sodium-Ion Batteries

© 2025 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 40 vom: 01. Okt., Seite e05368
1. Verfasser: Liu, Mingquan (VerfasserIn)
Weitere Verfasser: Cai, Junming, Zuo, Yinze, Luo, Wenhao, Huang, Yifeng, Qiu, Ruoxue, Luo, Yiyuan, Lei, Jie, Yan, Hao, Yan, Wei, Zhang, Jiujun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article anion decomposition binder continuously‐distributed crystalline‐NaF‐rich SEI hard carbon
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520 |a Constructing the continuously-distributed and crystalline-NaF-rich solid electrolyte interface (CC-NaF-SEI) is expected to greatly promote the sodium storage performance of hard carbon (HC) anodes. However, such an impressive concept remains extremely intractable to achieve and lacks an efficiently cost-less strategy. Herein, the application of the commercially available LA133 binder is pioneered to engineer such a CC-NaF-SEI. Through comparative analysis of representative binders with distinct functional groups, reveals the critical role of binder chemistry on SEI regulation. Specifically, the LA133 binder demonstrates a dual-regulation mechanism for CC-NaF-SEI formation. The anion-coordination preferred ─CN bonds induce an anion-enriched interfacial solvation structure, and the ─CONH/─CN groups catalytically cleave P─F bond dissociation in PF6 -, synergistically promoting anion decomposition kinetics to form crystalline NaF. Furthermore, robust hydrogen bonds between multiple polar groups in LA133 and HC surface create the spatially anion-confined microenvironments to guide orderly anion decomposition and facilitate continuous NaF growth into a mechanically integrated SEI. The optimized CC-NaF-SEI endows HC anodes with exceptional sodium storage performance: an ultrahigh initial Coulombic efficiency (95.9%), remarkable reversible capacity (356.6 mAh g-1), and stable cycling under extreme conditions (-20-60 °C). This work provides fundamental insights into binder-SEI correlations, establishing a novel paradigm for interfacial optimization in sodium-ion batteries 
650 4 |a Journal Article 
650 4 |a anion decomposition 
650 4 |a binder 
650 4 |a continuously‐distributed 
650 4 |a crystalline‐NaF‐rich SEI 
650 4 |a hard carbon 
700 1 |a Cai, Junming  |e verfasserin  |4 aut 
700 1 |a Zuo, Yinze  |e verfasserin  |4 aut 
700 1 |a Luo, Wenhao  |e verfasserin  |4 aut 
700 1 |a Huang, Yifeng  |e verfasserin  |4 aut 
700 1 |a Qiu, Ruoxue  |e verfasserin  |4 aut 
700 1 |a Luo, Yiyuan  |e verfasserin  |4 aut 
700 1 |a Lei, Jie  |e verfasserin  |4 aut 
700 1 |a Yan, Hao  |e verfasserin  |4 aut 
700 1 |a Yan, Wei  |e verfasserin  |4 aut 
700 1 |a Zhang, Jiujun  |e verfasserin  |4 aut 
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773 1 8 |g volume:37  |g year:2025  |g number:40  |g day:01  |g month:10  |g pages:e05368 
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