Hydrothermal realization of a hierarchical, flowerlike MnWO 4@MWCNTs nanocomposite with enhanced reversible Li storage as a new anode material

Hyun Woo Shim, Ah Hyeon Lim, Jae Chan Kim, Gwang Hee Lee, Dong-Wan Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A phase-pure MnWO4-based nanocomposite, MnWO4@MWCNTs (MWCNTs=multiwalled carbon nanotubes), was successfully synthesized through a simple hydrothermal reaction at 180 °C by adjusting the pH of the precursor medium. The resulting nanocomposite maintains the original flowerlike morphology of MnWO4 with hierarchical structures composed of numerous single-crystalline nanorods that drive growth preferentially along the [001] direction. The growth mechanism for the flowerlike formations is also discussed. In addition, the Li electroactivity of pure MnWO4 and MnWO 4@MWCNTs electrodes was investigated. As an anode for Li-ion batteries, the MnWO4@MWCNTs nanocomposite showed enhanced electrochemical performance in reversible Li storage relative to that shown by bare MnWO4 electrodes, including a high capacity of 425 mAh g -1 and superior rate performance. This performance can be attributed to the synergistic effect of the nanocomposite combined with the MWCNTs, which provide efficient electron transport in their role as a conductor. Positively attracted: A hierarchical, flowerlike MnWO4-based composite with multiwalled carbon nanotubes (MWCNTs) was synthesized through a one-pot hydrothermal route and evaluated as new anodes for Li-ion batteries. Relative to bare MnWO4 electrodes, the composite electrodes exhibit outstanding electrochemical behavior with increased cyclability and rate capability and a high specific capacity.

Original languageEnglish
Pages (from-to)2851-2858
Number of pages8
JournalChemistry - An Asian Journal
Volume8
Issue number11
DOIs
Publication statusPublished - 2013 Nov 1
Externally publishedYes

Keywords

  • anodes
  • electrochemistry
  • hydrothermal synthesis
  • manganese tungstate
  • nanocomposites

ASJC Scopus subject areas

  • Chemistry(all)

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