SnS2 /SnO2 Heterostructures towards Enhanced Electrochemical Performance of Lithium-Sulfur Batteries

Chemistry : a European Journal
Maoxu WangKening Sun

Abstract

Lithium-sulfur (Li-S) batteries have been recognized as outstanding candidates for energy storage systems due to their superiority in terms of energy density. To meet the requirements for practical use, it is necessary to develop an effective method to realize Li-S batteries with high sulfur utilization and cycle stability. Here, a strategy to construct heterostructure composites as cathodes for high performance Li-S batteries is presented. Taking the SnS2 /SnO2 couple as an example, SnS2 /SnO2 nanosheet heterostructures on carbon nanofibers (CNFs), named C@SnS2 /SnO2 , were designed and synthesized. Considering the electrochemical performance of SnS2 /SnO2 heterostructures, it is interesting to note that the existence of heterointerfaces could efficiently improve lithium ion diffusion rate so as to accelerate the redox reaction significantly, thus leading to the enhanced sulfur utilization and more excellent rate performance. Benefiting from the unique structure and heterointerfaces of C@SnS2 /SnO2 materials, the battery exhibited excellent cyclic stability and high sulfur utilization. This work may provide a powerful strategy for guiding the design of sulfur hosts from selecting the material composition to constructing of mic...Continue Reading

References

Dec 16, 2011·Nature Materials·Peter G BruceJean-Marie Tarascon
Jan 7, 2015·Nature Communications·Xiao LiangLinda F Nazar
May 9, 2015·ACS Applied Materials & Interfaces·Keng XuChangsheng Xie
Mar 12, 2016·Scientific Reports·Zhi-Zheng YangQi-Chuan Jiang
Jul 16, 2016·ACS Applied Materials & Interfaces·Xiaona LiYitai Qian
Jan 18, 2017·Proceedings of the National Academy of Sciences of the United States of America·Guangmin ZhouYi Cui
Sep 9, 2017·Nature Communications·Chenji HuLiwei Chen

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