Journal
CHEMICAL COMMUNICATIONS
Volume 55, Issue 88, Pages 13247-13250Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc06382j
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Funding
- National Natural Science Foundation of China [21204047, 21706292, 21674129]
- China Scholarship Council
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
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In this work, a high-performance cathode material was achieved by using SeS2 post-functionalization of a fluorinated covalent organic framework (COF) through SNAr chemistry. The chemical and physical confinement of polysulfides and polyselenides combined with enhanced conductivity boosted its electrochemical performance as a cathode material for lithium-sulfur batteries (LSBs). COF-F-SeS2 delivered a discharge capacity of 1633 mA h g(-1) at 0.1C, an excellent C-rate performance of 1163 mA h g(-1) at 1C and favorable long cycle performance. This work provides a feasible strategy to overcome the bottlenecks of LSBs for high capacity, excellent C-rate performance and enhanced cycle performance.
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