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Electron-delocalization catalyzers for high performance, low-temperature Li–S batteries

Zhang, Jing; Li, Lin; Yang, Mannan; Cheng, Chen; Tian, Na ; Zhang, Yongzheng; Jiao, Dongmao; Lin, Hongzhen ; Wang, Jian 1,2
1 Karlsruher Institut für Technologie (KIT)
2 Helmholtz-Institut Ulm (HIU), Karlsruher Institut für Technologie (KIT)

Abstract:

The extremely depressive conversion kinetics of polysulfides due to
sluggish Li+diffusion kinetics remain to be resolved for low-temperature
Li–S batteries (LT-LSB). Herein, the strategy for electron-delocalization of
nanocatalysts has been designed through introducing oxygen defects on
vanadium trioxide that was anchored on a porous carbon network
(ODVO@PCN). The reconstructed active sites of the V2+ state tend to
interact with sulfur species more easily due to the stronger hybridization
between V2+ sites and S sites in sulfur species, allowing enhanced Li+
transformation kinetics across the electrolyte/electrode interface for a fast
redox reaction in the low-temperature surrounding. Consequently, at a
low temperature of 0° C, the cell with the ODVO@PCN kinetic promotor
exhibits 501 mA h g1 at 1C and a long life time of up to 400 cycles
at 0.5C. Reduced to ultralow -10° C, the cell still provides a capacity of
706 mA h g1 and stabilizes a remarkable capacity retention of 85% after
100 cycles.

Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Karlsruher Institut für Technologie (KIT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 21.11.2024
Sprache Englisch
Identifikator ISSN: 1359-7345, 0022-4936, 0009-241X, 1364-548X, 2050-5620, 2050-5639
KITopen-ID: 1000177152
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Chemical Communications
Verlag Royal Society of Chemistry (RSC)
Band 60
Heft 94
Seiten 13891–13894
Nachgewiesen in Dimensions
Web of Science
Scopus
Globale Ziele für nachhaltige Entwicklung Ziel 7 – Bezahlbare und saubere Energie

Verlagsausgabe §
DOI: 10.5445/IR/1000177152
Veröffentlicht am 17.12.2024
Seitenaufrufe: 22
seit 17.12.2024
Downloads: 9
seit 20.12.2024
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