High-Performance Li-SeSx All-Solid-State Lithium Batteries
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 17 vom: 23. Apr., Seite e1808100 |
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| Weitere Verfasser: | , , , , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2019
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article high capacity selenium sulfide solid solutions solid-state batteries sulfide electrolytes |
| Zusammenfassung: | © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All-solid-state Li-S batteries are promising candidates for next-generation energy-storage systems considering their high energy density and high safety. However, their development is hindered by the sluggish electrochemical kinetics and low S utilization due to high interfacial resistance and the electronic insulating nature of S. Herein, Se is introduced into S cathodes by forming SeSx solid solutions to modify the electronic and ionic conductivities and ultimately enhance cathode utilization in all-solid-state lithium batteries (ASSLBs). Theoretical calculations confirm the redistribution of electron densities after introducing Se. The interfacial ionic conductivities of all achieved SeSx -Li3 PS4 (x = 3, 2, 1, and 0.33) composites are 10-6 S cm-1 . Stable and highly reversible SeSx cathodes for sulfide-based ASSLBs can be developed. Surprisingly, the SeS2 /Li10 GeP2 S12 -Li3 PS4 /Li solid-state cells exhibit excellent performance and deliver a high capacity over 1100 mAh g-1 (98.5% of its theoretical capacity) at 50 mA g-1 and remained highly stable for 100 cycles. Moreover, high loading cells can achieve high areal capacities up to 12.6 mAh cm-2 . This research deepens the understanding of Se-S solid solution chemistry in ASSLB systems and offers a new strategy to achieve high-performance S-based cathodes for application in ASSLBs |
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| Beschreibung: | Date Revised 01.10.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.201808100 |