Sulfur cathode based on layered carbon matrix for high-performance Li-S batteries

Feng Wu, Ji Qian, Renjie Chen*, Teng Zhao, Rui Xu, Yusheng Ye, Wenhui Li, Li Li, Jun Lu, Khalil Amine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

A novel carbon/sulfur composite has been fabricated by means of thermal and hydro-thermal treatments to serve as the cathode in Li-S batteries. The carbon matrix consists of graphene nanosheet (GS) and multiwalled carbon nanotube (MWCNT). The "GS/MWCNT@S" composite allows for infiltration of electrolyte into the cathode, assists in entrapment of polysulfide intermediates, and accommodates some of the stress and volume expansion that occurs during charge-discharge processes. In addition, the uniform distribution of sulfur in the conductive carbon matrix promotes utilization of the active materials. A Li-S cell containing the GS/MWCNT@S cathode delivered a capacity of 1290.8. mAh/g and exhibited stable specific capacities up to 612.1. mAh/g after 200 cycles at 0.1. C. These results demonstrate that this cathode material is a promising candidate for rechargeable lithium batteries with high energy density.

Original languageEnglish
Pages (from-to)742-749
Number of pages8
JournalNano Energy
Volume12
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Carbon matrix
  • Cathode
  • Graphene sheet
  • Lithium-sulfur battery
  • Multi-walled carbon nanotube

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Wu, F., Qian, J., Chen, R., Zhao, T., Xu, R., Ye, Y., Li, W., Li, L., Lu, J., & Amine, K. (2015). Sulfur cathode based on layered carbon matrix for high-performance Li-S batteries. Nano Energy, 12, 742-749. https://doi.org/10.1016/j.nanoen.2014.12.042