Journal
NANOSCALE
Volume 7, Issue 13, Pages 5592-5597Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr06863g
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Funding
- National Basic Research Program of China [2014CB932400]
- National Natural Science Foundation of China [U1401243, 51372167, 51302146]
- Shenzhen Basic Research Project [ZDSYS20140509172959981]
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This work reports a high-density graphene/sulfur assembly for compact Li-S batteries with high volumetric capacity, which retains good structural stability and conductivity. This dense assembly was prepared by a reduction-triggered self-assembly of graphene oxide with simultaneous deposition of sulfur, followed by unique evaporation-induced spatial volume shrinkage. This assembly has an ultrahigh density, delivering an unprecedented volumetric capacity that is much higher than common carbon/sulfur cathodes. In particular, the unique spatial confinement derived from the shrinkage of the graphene/sulfur assembly is favorable for stabilizing sulfur cathodes.
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