Details

Autor(en) / Beteiligte

• Wang, Maoxu
• Fan, Lishuang
• Wu, Xian
• Qiu, Yue
• Wang, Yan
• Zhang, Naiqing
• Sun, Kening

Titel

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

Ist Teil von

• Chemistry : a European journal, 2019-04, Vol.25 (21), p.5416-5421

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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 microstructure. A better performance! New polar SnS2/SnO2 heterostructures as sulfur hosting materials are presented in this work. By combining the merits of metal oxides and sulfides, the battery demonstrated enhanced electrochemical performance.