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Hydrothermal Realization of a Hierarchical, Flowerlike MnWO 4 @MWCNTs Nanocomposite with Enhanced Reversible Li Storage as a New Anode Material
Author(s) -
Shim HyunWoo,
Lim AhHyeon,
Kim JaeChan,
Lee GwangHee,
Kim DongWan
Publication year - 2013
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201300765
Subject(s) - nanocomposite , anode , nanorod , materials science , hydrothermal circulation , electrochemistry , electrode , chemical engineering , carbon nanotube , nanotechnology , chemistry , engineering
A phase‐pure MnWO 4 ‐based nanocomposite, MnWO 4 @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 MnWO 4 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 MnWO 4 and MnWO 4 @MWCNTs electrodes was investigated. As an anode for Li‐ion batteries, the MnWO 4 @MWCNTs nanocomposite showed enhanced electrochemical performance in reversible Li storage relative to that shown by bare MnWO 4 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.