A high-density graphene-sulfur assembly: a promising cathode for compact Li-S batteries.
Nanoscale
; 7(13): 5592-7, 2015 Mar 19.
Article
em En
| MEDLINE
| ID: mdl-25626595
ABSTRACT
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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MEDLINE
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En
Ano de publicação:
2015
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Article