• 文献标题:   Kombucha SCOBY-based carbon and graphene oxide wrapped sulfur/polyacrylonitrile as a high-capacity cathode in lithium-sulfur batteries
  • 文献类型:   Article
  • 作  者:   KALAIAPPAN K, RENGAPILLAI S, MARIMUTHU S, MURUGAN R, THIRU P
  • 作者关键词:   sulfur cathode, kombucha scoby, graphene oxide, polyacrylonitrile, lithiumsulfur battery
  • 出版物名称:   FRONTIERS OF CHEMICAL SCIENCE ENGINEERING
  • ISSN:   2095-0179 EI 2095-0187
  • 通讯作者地址:   Alagappa Univ
  • 被引频次:   0
  • DOI:   10.1007/s11705-019-1897-x EA MAR 2020
  • 出版年:   2020

▎ 摘  要

Hierarchically-porous carbon nano sheets were prepared as a conductive additive for sulfur/polyacrylonitrile (S/PAN) composite cathodes using a simple heat treatment. In this study, kombucha (that was derived from symbiotic culture of bacteria and yeast) carbon (KC) and graphene oxide (GO) were used as a carbon host matrix. These rational-designed S/PAN/KC/GO hybrid composites greatly suppress the diffusion of polysulfides by providing strong physical and chemical adsorption. The cathode delivered an initial discharge capacity of 1652 mAh center dot g-1 at a 0.1 C rate and a 100(th) cycle capacity of 1193 mAh center dot g-1. The nano sheets with embedded hierarchical pores create a conductive network that provide effective electron transfer and fast electrochemical kinetics. Further, the nitrogen component of PAN can raise the affinity/interaction of the carbon host with lithium polysulfides, supporting the cyclic performance. The results exploit the cumulative contribution of both the conductive carbon matrix and PAN in the enhanced performance of the positive electrode.