Single-Atom Vanadium Catalyst Boosting Reaction Kinetics of Polysulfides in Na-S Batteries

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 8 vom: 12. Feb., Seite e2208873
1. Verfasser:	Jiang, Yu (VerfasserIn)
Weitere Verfasser:	Yu, Zuxi, Zhou, XueFeng, Cheng, Xiaolong, Huang, Huijuan, Liu, Fanfan, Yang, Yaxiong, He, Shengnan, Pan, Hongge, Yang, Hai, Yao, Yu, Rui, Xianhong, Yu, Yan
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2023
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article catalytic polysulfide conversion chemical adsorption coordination structure of vanadium single-atom vanadium catalysts sodium-sulfur batteries

Beschreibung
Zusammenfassung:	© 2022 Wiley-VCH GmbH. The practical application of the room-temperature sodium-sulfur (RT Na-S) batteries is hindered by the insulated sulfur, the severe shuttle effect of sodium polysulfides, and insufficient polysulfide conversion. Herein, on the basis of first principles calculations, single-atom vanadium anchored on a 3D nitrogen-doped hierarchical porous carbon matrix (denoted as 3D-PNCV) is designed and fabricated to enhance sulfur reactivity, and adsorption and catalytic conversion performance of sodium polysulfide. The 3D-PNCV host with abundant and active V sites, hierarchical porous structure, high electrical conductivity, and strong chemical adsorption/conversion ability of V-N bonding can immobilize the polysulfides and promote reversibly catalytic conversion of polysulfides toward Na2 S. Therefore, as-fabricated RT Na-S batteries can achieve a high reversible capacity (445 mAh g-1 over 800 cycles at 5 A g-1 ) and excellent rate capability (224 mAh g-1 at 10 A g-1 ). The electrocatalysis mechanism of sodium polysulfides is further experimentally and theoretically revealed, which provides a new strategy to develop the highly stable RT Na-S batteries
Beschreibung:	Date Completed 24.02.2023 Date Revised 24.02.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202208873