Coating of sulfur particles with manganese oxide nanowires as a cathode material in lithium-sulfur batteries

Jeongyeon Lee, Taejin Hwang, Yongho Lee, Joong Kee Lee, Wonchang Choi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

40 Citations (Scopus)

Abstract

α-MnO2 nanowires were synthesized by a hydrothermal method and then mixed with agglomerated sulfur powders. Homogeneous α-MnO2-coated sulfur particles were obtained by utilizing heat treatment intended to melt and recrystallize the sulfur. α-MnO2 nanowires lead to the suppression in re-agglomeration of sulfur powders during heat treatment and result in successful coating as well as decreased size in parent sulfur powders. The α-MnO2-coated sulfur particles were used as the cathode material for lithium-ion battery applications. Electrochemical evaluation such as the rate capability characteristics and impedance study indicates that the α-MnO2 coated sulfur cathode shows lower resistance and improved rate capability compared to a pristine sulfur cathode.

Original languageEnglish
Pages (from-to)132-135
Number of pages4
JournalMaterials Letters
Volume158
DOIs
Publication statusPublished - 11 Jun 2015

Keywords

  • Lithium-sulfur battery
  • Metallic oxide
  • Sulfur

ASJC Scopus subject areas

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

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