Browse

Covalent Triazine Frameworks Incorporating Charged Polypyrrole Channels for High-Performance Lithium-Sulfur Batteries

Cited 9 time in Web of Science Cited 9 time in Scopus
Authors
Kim, Jiheon; Elabd, Ahmed; Chung, Sung-Yoon; Coskun, Ali; Choi, Jang Wook
Issue Date
2020-05
Citation
Chemistry of Materials, Vol.32 No.10, pp.4185-4193
Abstract
Organosulfur polymers have emerged as promising electrode materials for lithium-sulfur (Li-S) batteries, mainly because of their ability to incorporate and stabilize high sulfur content. The low ionic and electronic conductivity of these polymers, however, limit their cycling performance at high active mass loadings. Moreover, Li-polysulfide (Li-PS) shuttling, a fatal phenomenon in the cyclability of Li-S batteries, can be mitigated via the entrapment of Li-PS by utilizing various supramolecular interactions. Herein, we report a new approach that incorporates one-dimensional charged polypyrrole into a two-dimensional covalent triazine framework (cPpy-S-CTF) synthesized in the presence of elemental sulfur. The cPpy-S-CTF enabled sulfur loadings up to 83 wt %, thanks to the perfluoroaryl-elemental sulfur SNAr chemistry. Notably, the addition of charged polypyrrole, cPpy, triggered a 3D nanochannel formation in the cPpy-S-CTF with high-affinity anchoring sites toward Li-PS, while achieving decent ionic and electronic conductivity. The cPpy-S-CTF showed a remarkable electrochemical performance with a specific capacity of 1203.4 mA h g(-1) at 0.05 C, an initial Coulombic efficiency of 94.1%, and a capacity retention of 86.8% after 500 cycles. These results point to the fact that the incorporation of charged conducting polymers could be a universal strategy to boost the electrochemical performance of organosulfur polymers in Li-S batteries.
ISSN
0897-4756
URI
https://hdl.handle.net/10371/171747
DOI
https://doi.org/10.1021/acs.chemmater.0c00246
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse