Journal
NANOSCALE RESEARCH LETTERS
Volume 10, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-015-1152-4
Keywords
Lithium/sulfur battery; Sulfur/nitrogen-doped carbon nanotube composite cathode; Free-standing electrode
Funding
- Technology Commercialization Project of the World Bank
- Government of Kazakhstan (group 157)
- Ministry of Education and Science of Kazakhstan
- National Natural Science Foundation of China [21406052]
- Program for the Outstanding Young Talents of Hebei Province [BJ2014010]
- Youth Foundation of Hebei Educational Committee [QN2014094]
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A free-standing sulfur/nitrogen-doped carbon nanotube (S/N-CNT) composite prepared via a simple solution method was first studied as a cathode material for lithium/sulfur batteries. By taking advantage of the self-weaving behavior of N-CNT, binders and current collectors are rendered unnecessary in the cathode, thereby simplifying its manufacturing and increasing the sulfur weight ratio in the electrode. Transmission electronic microscopy showed the formation of a highly developed core-shell tubular structure consisting of S/N-CNT composite with uniform sulfur coating on the surface of N-CNT. As a core in the composite, the N-CNT with N functionalization provides a highly conductive and mechanically flexible framework, enhancing the electronic conductivity and consequently the rate capability of the material.
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