Journal
ELECTROCHEMISTRY
Volume 84, Issue 1, Pages 7-11Publisher
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.84.7
Keywords
Carbon Nanotubes; Nanocomposites; Simple Stirring Mixing; Lithium/Sulfur Battery
Categories
Funding
- National Natural Science Foundation of China - Program for the Outstanding Young Talents of Hebei Province [21406052, BJ2014010]
- Technology Commercialization Project by the World Bank [157-2013]
- Government of the Republic of Kazakhstan
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Due to the hydrophobic nature of multiwalled carbon nanotube (MWNT), sodium dodecylbenzene sulfonate (SDBS) was adopted as a surfactant to synthesize a well-dispersed, homogeneous MWNT aqueous suspension. By simple stirring mixing of the resultant MWNT suspension with nano-sulfur aqueous suspension, a novel porous sulfur/multiwalled carbon nanotube composite (S/MWNT) was synthesized. This preparation method based on the suspension mixing possesses the advantages of simplicity and low cost. Homogeneous dispersion and integration of MWNT in the composite results in a porous, highly conductive and mechanically flexible framework with enhanced electronic conductivity and ability to absorb the polysulfides into its porous structure. The cell with this S/MWNT composite cathode demonstrates a high reversibility, resulting in a stable reversible specific discharge capacity of 708 mAh g(-1) after 100 cycles at 0.1 C. Furthermore, the S/MWNT composite cathode with sulfur content of 62.5 wt% exhibits a good rate capability with discharge capacities of 946, 780 and 516 mAh g(-1) at 0.5, 1 and 1.5 C, respectively. (C) The Electrochemical Society of Japan, All rights reserved.
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