Synthesis and electrochemical performance of polypyrrole-coated sulfur/multi-walled carbon nanotube composite cathode materials for lithium/sulfur batteries

Yaqiong Q. Wei, Yue Li, Zagipa Bakenova, Fuxing X. Yin, Haipeng P. Li, Yongguang G. Zhang, Zhumabay Bakenov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In situ chemical oxidation polymerization of pyrrole on the surface of sulfur/multi-walled carbon nanotube particle was carried out to synthesize a novel polypyrrole coated sulfur/multi-walled carbon nanotube (PPy@S/MWCNT) composite. The sulfur/multi-walled carbon nanotube composite (S/MWCNT) was prepared by a facile quasi-emulsion template method in an oil/water system. The ternary PPy@S/MWCNT composite was characterized by elemental analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical measurements. In the composite, polypyrrole works as a conducting matrix as well as a coating agent, confining the active materials within the electrode, while the MWCNT creates a highly conductive and mechanically flexible framework, hence enhancing the electronic conductivity and the rate capability of the material. This ternary composite exhibits stable cyclability, retaining a discharge capacity of 612 mAh g-1 at 0.1 C after 100 cycles. Furthermore, up to 1.5 C rate, the ternary composite still delivered a highly reversible discharge capacity of 463 mAh g-1.

Original languageEnglish
Title of host publicationMaterials and Technologies for Energy Supply and Environmental Engineering
EditorsYafang Han, Ying Wu, Runhua Fan, Xuefeng Liu, Guangxian Li, Fusheng Pan, Fusheng Pan, Fusheng Pan
PublisherTrans Tech Publications
Pages33-38
Number of pages6
ISBN (Print)9783038356561
DOIs
Publication statusPublished - Jan 1 2016
EventChinese Materials Conference on Materials and Technologies for Energy Supply and Environmental Engineering, 2015 - Guiyang, China
Duration: Jul 10 2015Jul 14 2015

Publication series

NameMaterials Science Forum
Volume847
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherChinese Materials Conference on Materials and Technologies for Energy Supply and Environmental Engineering, 2015
CountryChina
CityGuiyang
Period7/10/157/14/15

Keywords

  • Lithium/sulfur battery
  • Nanocomposite
  • Polypyrrole coated sulfur/multi-walled carbon nanotube
  • Sulfur cathode

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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