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Sole Chemical Confinement of Polysulfides on Nonporous Nitrogen/Oxygen Dual-Doped Carbon at the Kilogram Scale for Lithium-Sulfur Batteries.
- Source :
-
Advanced Functional Materials . 1/5/2017, Vol. 27 Issue 1, pn/a-N.PAG. 13p. - Publication Year :
- 2017
-
Abstract
- The exploration of inexpensive, facile, and large-scale methods to prepare carbon scaffolds for high sulfur loadings is crucial for the advancement of Li-S batteries (LSBs). Herein, the authors report a new nitrogen and oxygen in situ dual-doped nonporous carbonaceous material (NONPCM) that is composed of a myriad of graphene-analogous particles. Importantly, NONPCM could be fabricated on a kilogram scale via inexpensive and green hydrothermal-carbonization-combined methods. Many active sites on the NONPCM surface are accessible for the efficient surface-chemistry confinement of guest sulfur and its discharge product; this confinement is exclusive of physical entrapment, considering the low surface area. Electrochemical examination demonstrates excellent cycle stability and rate performance of the NONPCM (K)/S composite, even with a sulfur loading of 80 or 90 wt%. Hence, the scaffolds for LSBs exhibit potential for industrialization through further optimization and expansion of the present synthesis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1616301X
- Volume :
- 27
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Advanced Functional Materials
- Publication Type :
- Academic Journal
- Accession number :
- 120534147
- Full Text :
- https://doi.org/10.1002/adfm.201604265