Direct conversion of multilayer molybdenum trioxide to nanorods as multifunctional electrodes in lithium-ion batteries

Mohammed Aziz Ibrahem, Feng Yu Wu, Desalegn Alemu Mengistie, Chia Seng Chang, Lain Jong Li, Chih Wei Chu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

In this study we prepared molybdenum trioxide (MoO3) nanorods having average lengths of 0.5-1.5 μm and widths of approximately 100-200 nm through a one-step mechanical break-down process involving favorable fracturing along the crystal direction. We controlled the dimensions of the as-prepared nanorods by applying various imposing times (15-90 min). The nanorods prepared over a reaction time of 90 min were, on average, much shorter and narrower relative to those obtained over 30 min. Evaluations of lithium-ion storage properties revealed that the electrochemical performance of these nanorods was much better than that of bulk materials. As cathodes, the nanorods could deliver a high specific capacity (>315 mA h g-1) with losses of less than 2% in the first cycle at a rate of 30 mA g-1; as anodes, the specific capacity was 800 mA h g-1 at a rate of 50 mA g-1. Relative to α-MoO3 microparticles, these nanorods displayed significantly enhanced lithium-ion storage properties with higher reversible capacities and better rate performance, presumably because their much shorter diffusion lengths and higher specific surface areas allowed more-efficient insertion/deinsertion of lithium ions during the charge/discharge process. Accordingly, enhanced physical and/or chemical properties can be obtained through appropriate nanostructuring of materials. This journal is

Original languageEnglish (US)
Pages (from-to)5484-5490
Number of pages7
JournalNanoscale
Volume6
Issue number10
DOIs
StatePublished - May 21 2014
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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