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Pore-space-partitioned MOF separator promotes high-sulfur-loading Li–S batteries with intensified rate capability and cycling life
- Source :
- Journal of Materials Chemistry A. 9:26929-26938
- Publication Year :
- 2021
- Publisher :
- Royal Society of Chemistry (RSC), 2021.
-
Abstract
- An elaborately modified separator capable of simultaneously blocking polysulfide shuttle and promoting Li+ ion transport is crucial for developing high-energy-density lithium–sulfur (Li–S) batteries with outstanding rate performance and long cycling stability. Herein, we demonstrate an intriguing pore-space-partition strategy to reconstruct the pore network and pore chemical environment of a prototype metal–organic framework (MOF), empowering it with remarkably enhanced performance as a separator coating in Li–S batteries. The finely tailored MOF has a rational pore size, large specific surface area and abundant catalytic sites, which synergistically facilitate Li+ ion conduction, inhibit polysulfide shuttle, and boost catalytic polysulfide conversion, thereby realizing both outstanding rate capability and cycling stability in high sulfur loading cathodes. The as-developed cell exhibits superb cyclability with a capacity retention of 79.0% over 500 cycles. More impressively, steady cyclability and a high areal capacity of 3.96 mA h cm−2 are achieved at a current density of up to 3.1 mA cm−2 with 78 wt% high sulfur content. This work provides new insights into separator engineering for high-performance Li–S batteries, and would advance the development of MOF separators in various energy storage technologies.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
chemistry.chemical_element
Separator (oil production)
General Chemistry
engineering.material
Sulfur
Cathode
Energy storage
law.invention
Catalysis
chemistry.chemical_compound
Coating
Chemical engineering
chemistry
law
Specific surface area
engineering
General Materials Science
Polysulfide
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry A
- Accession number :
- edsair.doi...........14864cf5ec9168f28493131170ac3d9e