Issue 88, 2019

Chemical anchoring of SeS2 on a fluoro-substituted covalent organic framework as a high-performance cathode material

Abstract

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.

Graphical abstract: Chemical anchoring of SeS2 on a fluoro-substituted covalent organic framework as a high-performance cathode material

Supplementary files

Article information

Article type
Communication
Submitted
17 Aug 2019
Accepted
09 Oct 2019
First published
10 Oct 2019

Chem. Commun., 2019,55, 13247-13250

Chemical anchoring of SeS2 on a fluoro-substituted covalent organic framework as a high-performance cathode material

D. Wang, Y. Wang, M. Song, G. Kuang and K. Han, Chem. Commun., 2019, 55, 13247 DOI: 10.1039/C9CC06382J

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