Reversible Multielectron Redox Chemistry in a NASICON-Type Cathode toward High-Energy-Density and Long-Life Sodium-Ion Full Batteries

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 44 vom: 01. Nov., Seite e2304428
1. Verfasser: Zhou, Yifan (VerfasserIn)
Weitere Verfasser: Xu, Guofu, Lin, Jiande, Zhang, Yangpu, Fang, Guozhao, Zhou, Jiang, Cao, Xinxin, Liang, Shuquan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article NASICON structure cathode materials high energy density multielectron redox reaction sodium-ion batteries
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520 |a Na-superionic-conductor (NASICON)-type cathodes (e.g., Na3 V2 (PO4 )3 ) have attracted extensive attention due to their open and robust framework, fast Na+ mobility, and superior thermal stability. To commercialize sodium-ion batteries (SIBs), higher energy density and lower cost requirements are urgently needed for NASICON-type cathodes. Herein, Na3.5 V1.5 Fe0.5 (PO4 )3 (NVFP) is designed by an Fe-substitution strategy, which not only reduces the exorbitant cost of vanadium, but also realizes high-voltage multielectron reactions. The NVFP cathode can deliver extraordinary capacity (148.2 mAh g-1 ), and decent cycling durability up to 84% after 10 000 cycles at 100 C. In situ X-ray diffraction and ex situ X-ray photoelectron spectroscopy characterizations reveal reversible structural evolution and redox processes (Fe2+ /Fe3+ , V3+ /V4+ , and V4+ /V5+ ) during electrochemical reactions. The low ionic-migration energy barrier and ideal Na+ -diffusion kinetics are elucidated by density functional theory calculations. Combined with electron paramagnetic resonance spectroscopy, Fe with unpaired electrons in the 3d orbital is inseparable from the higher-valence redox activation. More competitively, coupling with a hard carbon (HC) anode, HC//NVFP full cells demonstrate high-rate capability and long-duration cycling lifespan (3000 stable cycles at 50 C), along with material-level energy density up to 304 Wh kg-1 . The present work can provide new perspectives to accelerate the commercialization of SIBs 
650 4 |a Journal Article 
650 4 |a NASICON structure 
650 4 |a cathode materials 
650 4 |a high energy density 
650 4 |a multielectron redox reaction 
650 4 |a sodium-ion batteries 
700 1 |a Xu, Guofu  |e verfasserin  |4 aut 
700 1 |a Lin, Jiande  |e verfasserin  |4 aut 
700 1 |a Zhang, Yangpu  |e verfasserin  |4 aut 
700 1 |a Fang, Guozhao  |e verfasserin  |4 aut 
700 1 |a Zhou, Jiang  |e verfasserin  |4 aut 
700 1 |a Cao, Xinxin  |e verfasserin  |4 aut 
700 1 |a Liang, Shuquan  |e verfasserin  |4 aut 
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773 1 8 |g volume:35  |g year:2023  |g number:44  |g day:01  |g month:11  |g pages:e2304428 
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