Li2S has made the concept of Li-S batteries much more promising due to the relatively high storage capacity, the possibility of using Li-free anodes and the increase of microstructural stability. However, similar to S, Li2S also suffers from the insulating nature and polysulfides dissolution problem. The results presented here show a facile and cost-effective approach by using a plasma sparking and chemical S sulfurization process to synthesize core-shell Li2S@C nanocomposites. The nanocomposites show a significantly reduced particle size and well-developed core-shell architecture, effectively shortening the Li-ion diffusion distance, enhancing the electronic conductivity and suppressing the dissolution losses of polysulfides. As a result, a much improved rate and cycling performance has been achieved. The method presented in this study offers good opportunities for scaling up the production of high performance cathode materials in a simple and low-cost way to be applied in future generations Li-S batteries.
Chen, C., Li, D., Gao, L., Harks, P. P. R. M. L., Eichel, R. A., & Notten, P. H. L. (2017). Carbon-coated core-shell Li2S@C nanocomposites as high performance cathode material for Lithium-Sulfur batteries. Journal of Materials Chemistry A, 5(4), 1428-1433. https://doi.org/10.1039/C6TA09146F