Sulfide‐bridged covalent quinoxaline frameworks for lithium–organosulfide batteries

Abstract: The chelating ability of quinoxaline cores and the redox activity of organosulfide bridges in layered covalent organic frameworks (COFs) offer dual active sites for reversible lithium (Li)-storage. The designed COFs combining these properties feature disulfide and polysulfide-bridged networks showcasing an intriguing Li-storage mechanism, which can be considered as a lithium–organosulfide (Li–OrS) battery. The experimental–computational elucidation of three quinoxaline COFs containing systematically enhanced sulfur atoms in sulfide bridging demonstrates fast kinetics during Li interactions with the quinoxaline core. Meanwhile, bilateral covalent bonding of sulfide bridges to the quinoxaline core enables a redox-mediated reversible cleavage of the sulfursulfur bond and the formation of covalently anchored lithium–sulfide chains or clusters during Li-interactions, accompanied by a marked reduction of Li–polysulfide (Li–PS) dissolution into the electrolyte, a frequent drawback of lithium–sulfur (Li–S) batteries. The electrochemical behavior of model compounds mimicking the sulfide linkages of the COFs and operando Raman studies on the framework structure unravels the reversibility of the profound Li-ion–organosulfide interactions. Thus, integrating redox-active organic-framework materials with covalently anchored sulfides enables a stable Li–OrS battery mechanism which shows benefits over a typical Li–S battery

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
ISSN: 1521-4095

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2024
Urheber
Haldar, Sattwick
Bhauriyal, Preeti
Ramuglia, Anthony R.
Khan, Arafat H.
Kock, Sunel de
Hazra, Arpan
Bon, Volodymyr
Pastötter, Dominik
Kirchhoff, Sebastian
Shupletsov, Leonid
De, Ankita
Isaacs, Mark A.
Feng, Xinliang
Walter, Michael
Brunner, Eike
Weidinger, Inez Marita
Heine, Thomas
Schneemann, Andreas
Kaskel, Stefan

DOI
10.1002/adma.202210151
URN
urn:nbn:de:bsz:25-freidok-2428991
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:33 MESZ

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  • 2024

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