Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 32, Pages 12471-12478Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta04529d
Keywords
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Funding
- National Science Foundation (NSF) through NSF-CBET [1505943, 1336057]
- ACS Petroleum Research Fund (PRF) [53560-DNI 10]
- DOE STTR through pH Matter LLC. [DE-SC0013831]
- University of Akron
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A nanoporous nitrogen doped carbon matrix was prepared by carbonization of metal-organic framework zeolitic imidazolate framework (ZIF-8) precursors. The doped carbon matrix was melt-infiltrated with sulfur to form a carbonized ZIF-8/S composite. The composite material exhibited good performance as the cathode for room-temperature sodium-sulfur battery (Na-S) systems. A reversible specific capacity of around 1000 mA h g(-1) could be achieved at a rate of 0.1C; and a reversible specific capacity of 500 mA h g(-1) was obtained at a rate of 0.2C after 250 cycles. The good performance of the Na-S battery could be attributed to the synergistic effect from the nanoporosity of the carbon matrix and the high nitrogen-doping content (ca. similar to 18 at%). These attributes enhanced the entrapment of the sulfur molecules inside the carbon matrices.
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