Sulfide-Bridged Covalent Quinoxaline Frameworks for Lithium–Organosulfide Batteries
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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.
Details
Original language | English |
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Article number | 2210151 |
Number of pages | 14 |
Journal | Advanced materials |
Volume | 35 |
Issue number | 16 |
Publication status | Published - 13 Mar 2023 |
Peer-reviewed | Yes |
External IDs
WOS | 000948354700001 |
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Keywords
Research priority areas of TU Dresden
ASJC Scopus subject areas
Keywords
- 2D materials, covalent organic frameworks, mechanism studies, sulfide batteries, Covalent organic frameworks, Mechanism studies, Sulfide batteries