Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 22, Pages 6176-6180Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201700686
Keywords
carbon nanotubes; energy storage; high energy density; lithium-sulfur batteries; metal-organic frameworks
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Funding
- National Key Research and Development Program of China [2016YFA0200204]
- National Basic Research Program of China 973 Program [2015CB655302]
- National Natural Science Foundations of China [NSFC 21671171]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
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Rational design of cathode hosts with high electrical conductivity and strong sulfur confinement is a great need for high-performance lithium-sulfur batteries. Herein, we report a self-standing, hybrid-nanostructured cathode host comprised of metal-organic framework (MOF)-derived porous carbon polyhedrons and carbon nanotubes (CNTs) for the significant improvement of both the electrode cyclability and energy density. The strong coupling of the intertwined CNTs and strung porous carbon polyhedrons as a binder-free thin film significantly enhances the long-range electronic conductivity and provides abundant active interfaces as well as robust electrode integrity for sulfur electrochemistry. Attributed to the synergistic combination of the CNTs and carbon polyhedrons, the obtained sulfur electrodes exhibit outstanding cyclability, an excellent high-rate response up to 10C, and an ultra-high volumetric capacity of 960 Ah L-1.
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