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MOF-Derived CeO 2 Nanorod as a Separator Coating Enabling Enhanced Performance for Lithium–Sulfur Batteries.
- Source :
- Molecules; Apr2024, Vol. 29 Issue 8, p1852, 12p
- Publication Year :
- 2024
-
Abstract
- The deployment of Li–S batteries in the commercial sector faces obstacles due to their low electrical conductivity, slow redox reactions, quick fading of capacity, and reduced coulombic efficiency. These issues stem from the "shuttle effect" associated with lithium polysulfides (LiPSs). In this work, a haystack-like CeO<subscript>2</subscript> derived from a cerium-based metal-organic framework (Ce-MOF) is obtained for the modification of a polypropylene separator. The carbon framework and CeO<subscript>2</subscript> coexist in this haystack-like structure and contribute to a synergistic effect on the restriction of LiPSs shuttling. The carbon network enhances electron transfer in the conversion of LiPSs, improving the rate performance of the battery. Moreover, CeO<subscript>2</subscript> enhances the redox kinetics of LiPSs, effectively reducing the "shuttle effect" in Li–S batteries. The Li–S battery with the optimized CeO<subscript>2</subscript> modified separator shows an initial discharge capacity of 870.7 mAh/g at 2 C, maintaining excellent capacity over 500 cycles. This research offers insights into designing functional separators to mitigate the "shuttle effect" in Li–S batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 29
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Molecules
- Publication Type :
- Academic Journal
- Accession number :
- 176904877
- Full Text :
- https://doi.org/10.3390/molecules29081852