Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 27, Issue 1, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201604265
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Funding
- National Natural Science Fund of China [21371108]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201304]
- Fundamental Research Funds of Shandong University [2016JC033]
- Shandong University [2016GN010]
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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.
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