Journal
ADVANCED SCIENCE
Volume 7, Issue 21, Pages -Publisher
WILEY
DOI: 10.1002/advs.201903260
Keywords
electrocatalysis; interlayers; lithium-sulfur batteries; polysulfide conversion; synergic effects
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Funding
- Natural Science Foundation of Guangdong Province [2019A1515011573, 2019A1515011955]
- Shenzhen Basic Research Project [JCYJ20170817160837382]
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The shuttle effect of soluble lithium polysulfides during the charge/discharge process is the key bottleneck hindering the practical application of lithium-sulfur batteries. Herein, a multifunctional interlayer is developed by growing metallic molybdenum disulfide nanosheets on both outer and inner walls of cotton cloth derived carbon microtube textile (MoS2@CMT). The hollow structure of CMT provides channels to favor electrolyte penetration, Li(+)diffusion and restrains polysulfides via physical confinement. The hydrophilic and conductive 1T-MoS(2)nanosheets facilitate chemisorption and kinetic behavior of polysulfides. The synergic effect of 1T-MoS(2)nanosheets and CMT affords the MoS2@CMT interlayer with an efficient trapping-diffusion-conversion ability toward polysulfides. Therefore, the cell with the MoS2@CMT interlayer exhibits enhanced cycling life (765 mAh g(-1)after 500 cycles at 0.5 C) and rate performance (974 mAh g(-1)at 2 C and 740 mAh g(-1)at 5 C). This study presents a pathway to develop low-cost multifunctional interlayers for advanced lithium-sulfur batteries.
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