Well-dispersed sulfur anchored on interconnected polypyrrole nanofiber network as high performance cathode for lithium-sulfur batteries

作者：Yin, Fuxing; Liu, Xinyi; Zhang, Yongguang^*; Zhao, Yan; Menbayeva, Almagul; Bakenov, Zhumabay; Wang, Xin^*

来源：Solid State Sciences, 2017, 66: 44-49.

DOI：10.1016/j.solidstatesciences.2017.02.009

• Lithium/sulfur battery
• Nanostructured sulfur cathode
• PPy nanowire network
• S/PPy composite

Preparation of novel sulfur/polypyrrole (S/PPy) composite consisting well-dispersed sulfur particles anchored on interconnected PPy nanowire network was demonstrated. In such hybrid structure, the as prepared PPy clearly displays a three-dimensionally cross-linked and hierarchical porous structure, which was utilized in the composite cathode as a conductive network trapping soluble polysulfide intermediates and enhancing the overall electrochemical performance of the system. Benefiting from this unique structure, the S/PPy composite demonstrated excellent cycling stability, resulting in a discharge capacity of 931 mAh g(-1) at the second cycle and retained about 54% of this value over 100 cycles at 0.1 C. Furthermore, the S/PPy composite cathode exhibits a good rate capability with a discharge capacity of 584 mAh g(-1) at 1 degrees C.

• 出版日期2017-4
• 单位华南师范大学; 河北工业大学