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Designing of multifunctional and flame retardant separator towards safer high-performance lithium-sulfur batteries.
- Source :
- Nano Research; Dec2021, Vol. 14 Issue 12, p4865-4877, 13p
- Publication Year :
- 2021
-
Abstract
- Owing to unprecedented merits such as high theoretical capacity, superior energy density and low cost, lithium-sulfur batteries (LSBs) show a bright future both in scientific and industrial areas. Whereas, the inherent issues, including highly insulating character, undesired shuttle behavior and lithium dendrites growth, are seriously impeding its practical usage. Here, a metal-organic-frameworks (MOFs) derived N, S co-doped carbon nanotube hollow architecture confining with CoS<subscript>2</subscript> nanoparticles (CoS<subscript>2</subscript>/NSCNHF) modified separator is designed to surmount these obstacles. Compared with Celgard separator, this designed separator shows obviously enhanced flame retardancy, giving 73.1% and 53.0% reductions in peak heat release rate and total heat release, separately. Concretely, its hollow structure, conductive feature, electrocatalytic activity and Lewis acid-base interaction enable the efficient inhibition on shuttle behavior as well as boost in polysulfides conversion kinetics. The cell with modified separator delivers a high discharge capacity of 1,284.5 mAh·g<superscript>−1</superscript>. After running for 100 cycles, a discharge capacity of 661.3 mAh·g<superscript>−1</superscript> is remained. Markedly, the suppression on lithium dendrites growth is also observed, manifesting the enhanced battery safety. Overall, this work may shed light on the effective usage of MOFs-derived hierarchical composite in achieving LSBs with high electrochemical performance as well as safety. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 19980124
- Volume :
- 14
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Nano Research
- Publication Type :
- Academic Journal
- Accession number :
- 153317353
- Full Text :
- https://doi.org/10.1007/s12274-021-3446-4