Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles as sulfur encapsulator for high-performance lithium/sulfur batteries

Yan Zhao, Zhengjun Liu, Liancheng Sun, Yongguang Zhang, Yuting Feng, Xin Wang, Indira Kurmanbayeva, Zhumabay Bakenov

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles (ZnO@NCNT) were prepared via a sol-gel route as sulfur encapsulator for lithium/sulfur (Li/S) batteries. The electrochemical properties of the S/ZnO@NCNT composite cathode were evaluated in Li/S batteries. It delivered an initial capacity of 1032 mAh·g-1 at a charge/discharge rate of 0.2C and maintained a reversible capacity of 665 mAh·g-1 after 100 cycles. The coulombic efficiency of the cathode remains unchanged above 99%, showing stable cycling performance. X-ray photoelectron spectroscopy analysis confirmed the formation of S-Zn and S-O bonds in the composite. This indicates that an enhanced cycling and rate capability of the S/ZnO@NCNT composite could be ascribed to advantages of the ZnO@NCNT matrix. In the composite, the active ZnO-rich surfaces offer a high sulfur-bonding capability and the NCNT core acts as a conductive framework providing pathways for ion and electron transport. The as-prepared S/ZnO@NCNT composite is a promising cathode material for Li/S batteries.

Original languageEnglish
Pages (from-to)1677-1685
Number of pages9
JournalBeilstein Journal of Nanotechnology
Volume9
Issue number1
DOIs
Publication statusPublished - Jan 1 2018

Fingerprint

lithium sulfur batteries
Zinc Oxide
Carbon Nanotubes
Zinc oxide
Sulfur
zinc oxides
Carbon nanotubes
Nitrogen
sulfur
carbon nanotubes
Nanoparticles
nitrogen
nanoparticles
composite materials
Composite materials
Cathodes
cathodes
cycles
Electrochemical properties
Sol-gels

Keywords

  • Batteries
  • Nanocomposites
  • Sol-gel processes
  • Sulfur
  • Zinc oxide

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this

Nitrogen-doped carbon nanotubes coated with zinc oxide nanoparticles as sulfur encapsulator for high-performance lithium/sulfur batteries. / Zhao, Yan; Liu, Zhengjun; Sun, Liancheng; Zhang, Yongguang; Feng, Yuting; Wang, Xin; Kurmanbayeva, Indira; Bakenov, Zhumabay.

In: Beilstein Journal of Nanotechnology, Vol. 9, No. 1, 01.01.2018, p. 1677-1685.

Research output: Contribution to journalArticle

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