Spray deposition of LiMn2O4 nanoparticle-decorated multiwalled carbon nanotube films as cathode material for lithium-ion batteries

H. P. Hong, M. S. Kim, Y. H. Lee, J. S. Yu, C. J. Lee, N. K. Min

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We prepared LiMn2O4 nanoparticle-decorated multiwalled carbon nanotube (MWCNT) films as a cathode electrode for lithium-ion batteries using a spray-deposition method. The surface morphologies and structures of the films were characterized using scanning electron microscopy and X-ray diffraction analysis. The results revealed that fairly homogeneous spinel LiMn2O4 nanopowder-based films with the grain size of 20-50 nm were successfully formed on the surface of the MWCNTs. Cyclic voltammetry confirmed the presence of typical spinel LiMn2O 4 structure on the MWCNTs with showing stronger oxidative peaks of better reversibility as compared to a pure LiMn2O4 electrode. The spray-deposited LiMn2O4-decorated MWCNT film was also found to have a higher discharge capacity (97.2 mAh/g) than the as-deposited LiMn2O4 film (75.2 mAh/g) as well as excellent cycling stability. These characteristics are due to the fact that MWCNTs provide the cathode with multiple electron tunneling pathways and a mechanically strong framework.

Original languageEnglish
Pages (from-to)68-71
Number of pages4
JournalThin Solid Films
Volume547
DOIs
Publication statusPublished - 2013 Nov 29

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Keywords

  • LiMnO composite
  • MWCNT film
  • Spray deposition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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