• 文献标题:   Graphene coated and nitrogen-rich porous carbon composites with sulfur encapusulation as cathode for lithium-sulfur batteries
  • 文献类型:   Article
  • 作  者:   XI JJ, LIU J, GONG ZJ, WANG SX, LI XJ, YUAN JQ, MEI X, LUO ZK
  • 作者关键词:   lis battery, cathode, carbon material, mesoporou, energy storage conversion
  • 出版物名称:   MATERIALS LETTERS
  • ISSN:   0167-577X EI 1873-4979
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.matlet.2022.132050 EA MAR 2022
  • 出版年:   2022

▎ 摘  要

In this work, a three-dimensional porous composite (S/RGO@NPC) is prepared by graphene (RGO) coated nitrogen-rich porous carbon (NPC) and combined with sulfur. The doping of nitrogen and porous structure can alleviate the shuttling effect through chemical and physical double adsorption of polysulfide, respectively. RGO coating restricts the movement of polysulfide, further alleviates the shuttling effect, and also improves the electrical conductivity. Our results show when the sulfur content is 70% with a loading up to 3 mg/cm(2), the Li-S battery with S/RGO@NPC as cathode still shows good capacity (880.8mAh/g at 0.5C), and superior cycle stability (capacity retention of 68.1% after 400 cycles at 0.5C).